diff --git a/doc/build-helpers/fetchers.chapter.md b/doc/build-helpers/fetchers.chapter.md
index 6a6ebe9013c2..08b978e720dc 100644
--- a/doc/build-helpers/fetchers.chapter.md
+++ b/doc/build-helpers/fetchers.chapter.md
@@ -896,6 +896,24 @@ If `fetchSubmodules` is `true`, `fetchFromSourcehut` uses `fetchgit`
 or `fetchhg` with `fetchSubmodules` or `fetchSubrepos` set to `true`,
 respectively. Otherwise, the fetcher uses `fetchzip`.
 
+## `fetchFromRadicle` {#fetchfromradicle}
+
+This is used with Radicle repositories. The arguments expected are similar to `fetchgit`.
+
+Requires a `seed` argument (e.g. `seed.radicle.xyz` or `rosa.radicle.xyz`) and a `repo` argument
+(the repository id *without* the `rad:` prefix). Also accepts an optional `node` argument which
+contains the id of the node from which to fetch the specified ref. If `node` is `null` (the
+default), a canonical ref is fetched instead.
+
+```nix
+fetchFromRadicle {
+  seed = "seed.radicle.xyz";
+  repo = "z3gqcJUoA1n9HaHKufZs5FCSGazv5"; # heartwood
+  tag = "releases/1.3.0";
+  hash = "sha256-4o88BWKGGOjCIQy7anvzbA/kPOO+ZsLMzXJhE61odjw=";
+}
+```
+
 ## `requireFile` {#requirefile}
 
 `requireFile` allows requesting files that cannot be fetched automatically, but whose content is known.
diff --git a/doc/redirects.json b/doc/redirects.json
index 685e93538f85..7b0841c639b7 100644
--- a/doc/redirects.json
+++ b/doc/redirects.json
@@ -1666,6 +1666,9 @@
   "fetchfromsourcehut": [
     "index.html#fetchfromsourcehut"
   ],
+  "fetchfromradicle": [
+    "index.html#fetchfromradicle"
+  ],
   "requirefile": [
     "index.html#requirefile"
   ],
diff --git a/pkgs/build-support/fetchradicle/default.nix b/pkgs/build-support/fetchradicle/default.nix
new file mode 100644
index 000000000000..a8102c382c02
--- /dev/null
+++ b/pkgs/build-support/fetchradicle/default.nix
@@ -0,0 +1,44 @@
+{ lib, fetchgit }:
+
+lib.makeOverridable (
+  {
+    seed,
+    repo,
+    node ? null,
+    rev ? null,
+    tag ? null,
+    ...
+  }@args:
+
+  assert lib.assertMsg (lib.xor (tag != null) (
+    rev != null
+  )) "fetchFromRadicle requires one of either `rev` or `tag` to be provided (not both).";
+
+  let
+    namespacePrefix = lib.optionalString (node != null) "refs/namespaces/${node}/";
+    rev' = if tag != null then "refs/tags/${tag}" else rev;
+  in
+
+  fetchgit (
+    {
+      url = "https://${seed}/${repo}.git";
+      rev = "${namespacePrefix}${rev'}";
+    }
+    // removeAttrs args [
+      "seed"
+      "repo"
+      "node"
+      "rev"
+      "tag"
+    ]
+  )
+  // {
+    inherit
+      seed
+      repo
+      node
+      rev
+      tag
+      ;
+  }
+)
diff --git a/pkgs/by-name/ra/radicle-explorer/package.nix b/pkgs/by-name/ra/radicle-explorer/package.nix
index 6c467f96b1e1..15686e7c5a94 100644
--- a/pkgs/by-name/ra/radicle-explorer/package.nix
+++ b/pkgs/by-name/ra/radicle-explorer/package.nix
@@ -1,7 +1,6 @@
 {
   radicle-httpd,
   fetchFromGitHub,
-  fetchgit,
   lib,
   buildNpmPackage,
   writeText,
@@ -75,9 +74,9 @@ lib.fix (
       # same repo. For this reason we pin the sources to each other, but due to
       # radicle-httpd using a more limited sparse checkout we need to carry a
       # separate hash.
-      src = fetchgit {
-        inherit (radicle-httpd.src) url rev;
-        hash = "sha256-HRSrLdiDETTWNF+Rzvlg1XQerXcCE2xaY+6Xbq5pItI=";
+      src = radicle-httpd.src.override {
+        hash = "sha256-1OhZ0x21NlZIiTPCRpvdUsx5UmeLecTjVzH8DWllPr8=";
+        sparseCheckout = [ ];
       };
 
       postPatch = ''
diff --git a/pkgs/by-name/ra/radicle-httpd/package.nix b/pkgs/by-name/ra/radicle-httpd/package.nix
index d4067fff8029..7ff24edcab0d 100644
--- a/pkgs/by-name/ra/radicle-httpd/package.nix
+++ b/pkgs/by-name/ra/radicle-httpd/package.nix
@@ -1,6 +1,6 @@
 {
   asciidoctor,
-  fetchgit,
+  fetchFromRadicle,
   git,
   installShellFiles,
   lib,
@@ -16,11 +16,13 @@ rustPlatform.buildRustPackage rec {
   env.RADICLE_VERSION = version;
 
   # You must update the radicle-explorer source hash when changing this.
-  src = fetchgit {
-    url = "https://seed.radicle.xyz/z4V1sjrXqjvFdnCUbxPFqd5p4DtH5.git";
-    rev = "refs/namespaces/z6MkireRatUThvd3qzfKht1S44wpm4FEWSSa4PRMTSQZ3voM/refs/tags/v${version}";
-    hash = "sha256-9rJH4ECqOJ9wnYxCbEFHXo3PlhbPdeOnF+Pf1MzX25c=";
+  src = fetchFromRadicle {
+    seed = "seed.radicle.xyz";
+    repo = "z4V1sjrXqjvFdnCUbxPFqd5p4DtH5";
+    node = "z6MkireRatUThvd3qzfKht1S44wpm4FEWSSa4PRMTSQZ3voM";
+    tag = "v${version}";
     sparseCheckout = [ "radicle-httpd" ];
+    hash = "sha256-9rJH4ECqOJ9wnYxCbEFHXo3PlhbPdeOnF+Pf1MzX25c=";
   };
 
   sourceRoot = "${src.name}/radicle-httpd";
diff --git a/pkgs/by-name/ra/radicle-node/package.nix b/pkgs/by-name/ra/radicle-node/package.nix
index 15da4c6ec221..347044035a06 100644
--- a/pkgs/by-name/ra/radicle-node/package.nix
+++ b/pkgs/by-name/ra/radicle-node/package.nix
@@ -1,6 +1,6 @@
 {
   asciidoctor,
-  fetchgit,
+  fetchFromRadicle,
   git,
   installShellFiles,
   jq,
@@ -22,9 +22,11 @@ rustPlatform.buildRustPackage rec {
   version = "1.3.0";
   env.RADICLE_VERSION = version;
 
-  src = fetchgit {
-    url = "https://seed.radicle.xyz/z3gqcJUoA1n9HaHKufZs5FCSGazv5.git";
-    rev = "refs/namespaces/z6MkireRatUThvd3qzfKht1S44wpm4FEWSSa4PRMTSQZ3voM/refs/tags/v${version}";
+  src = fetchFromRadicle {
+    seed = "seed.radicle.xyz";
+    repo = "z3gqcJUoA1n9HaHKufZs5FCSGazv5";
+    node = "z6MkireRatUThvd3qzfKht1S44wpm4FEWSSa4PRMTSQZ3voM";
+    tag = "v${version}";
     hash = "sha256-0gK+fM/YGGpxlcR1HQixbLK0/sv+HH29h6ajEP2w2pI=";
     leaveDotGit = true;
     postFetch = ''
diff --git a/pkgs/by-name/ra/radicle-tui/package.nix b/pkgs/by-name/ra/radicle-tui/package.nix
index 46f954274414..0135691e39dd 100644
--- a/pkgs/by-name/ra/radicle-tui/package.nix
+++ b/pkgs/by-name/ra/radicle-tui/package.nix
@@ -1,7 +1,7 @@
 {
   lib,
   rustPlatform,
-  fetchgit,
+  fetchFromRadicle,
   stdenv,
   libiconv,
   zlib,
@@ -13,9 +13,11 @@ rustPlatform.buildRustPackage (finalAttrs: {
   pname = "radicle-tui";
   version = "0.6.0";
 
-  src = fetchgit {
-    url = "https://seed.radicle.xyz/z39mP9rQAaGmERfUMPULfPUi473tY.git";
-    rev = "refs/namespaces/z6MkswQE8gwZw924amKatxnNCXA55BMupMmRg7LvJuim2C1V/refs/tags/${finalAttrs.version}";
+  src = fetchFromRadicle {
+    seed = "seed.radicle.xyz";
+    repo = "z39mP9rQAaGmERfUMPULfPUi473tY";
+    node = "z6MkswQE8gwZw924amKatxnNCXA55BMupMmRg7LvJuim2C1V";
+    tag = finalAttrs.version;
     hash = "sha256-rz9l9GtycqZoROUI6Hn0Fv5Br0YCIrcHlEWLMP4hasQ=";
     leaveDotGit = true;
     postFetch = ''
diff --git a/pkgs/by-name/ra/radicle-tui/update.sh b/pkgs/by-name/ra/radicle-tui/update.sh
index 2f423909a9de..36a50daf217f 100755
--- a/pkgs/by-name/ra/radicle-tui/update.sh
+++ b/pkgs/by-name/ra/radicle-tui/update.sh
@@ -6,13 +6,10 @@ set -euo pipefail
 dirname="$(dirname "${BASH_SOURCE[0]}")"
 
 url=$(nix-instantiate --eval --raw -A radicle-tui.src.url)
-old_ref=$(nix-instantiate --eval --raw -A radicle-tui.src.rev)
-new_ref=$(git ls-remote "$url" 'refs/namespaces/*/refs/tags/*' | cut -f2 | tail -1)
+old_node=$(nix-instantiate --eval --raw -A radicle-tui.src.node)
 
-[[ "$old_ref" =~ ^refs/namespaces/([^/]+)/refs/tags/([^/]+)$ ]]
-old_node="${BASH_REMATCH[1]}"
-
-[[ "$new_ref" =~ ^refs/namespaces/([^/]+)/refs/tags/([^/]+)$ ]]
+ref=$(git ls-remote "$url" 'refs/namespaces/*/refs/tags/*' | cut -f2 | tail -1)
+[[ "$ref" =~ ^refs/namespaces/([^/]+)/refs/tags/([^/]+)$ ]]
 new_node="${BASH_REMATCH[1]}"
 version="${BASH_REMATCH[2]}"
 
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 5a8280e600fa..3072866de458 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -697,6 +697,8 @@ with pkgs;
 
   fetchFromRepoOrCz = callPackage ../build-support/fetchrepoorcz { };
 
+  fetchFromRadicle = callPackage ../build-support/fetchradicle { };
+
   fetchgx = callPackage ../build-support/fetchgx { };
 
   fetchPypi = callPackage ../build-support/fetchpypi { };