chatterino{2,7}: fix git commit display

pkgs/by-name/ch/chatterino2/common.nix

@@ -38,6 +38,12 @@ stdenv.mkDerivation {
     ]
     ++ lib.optional enableAvifSupport libavif;
 
+  preConfigure = ''
+    if [[ -f "$src/GIT_HASH" ]]; then
+      export GIT_HASH="$(cat $src/GIT_HASH)"
+    fi
+  '';
+
   cmakeFlags = [
     (lib.cmakeBool "BUILD_WITH_QT6" true)
     (lib.cmakeBool "USE_SYSTEM_QTKEYCHAIN" true)

pkgs/by-name/ch/chatterino2/package.nix

@@ -18,8 +18,13 @@
         owner = "Chatterino";
         repo = "chatterino2";
         tag = "v${finalAttrs.version}";
-        hash = "sha256-W2sqlqL6aa68aQ3nE161G64x7K7p8iByX03g1dseQbs=";
+        hash = "sha256-XV8WhdjdnVrOg0PVyIhGfxC4sJ62oH03KchvGr1c2w8=";
         fetchSubmodules = true;
+        leaveDotGit = true;
+        postFetch = ''
+          git -C $out rev-parse --short HEAD > $out/GIT_HASH
+          find "$out" -name .git -print0 | xargs -0 rm -rf
+        '';
       };
 
       passthru = {

pkgs/by-name/ch/chatterino7/package.nix

@@ -17,8 +17,13 @@
         owner = "SevenTV";
         repo = "chatterino7";
         tag = "v${finalAttrs.version}";
-        hash = "sha256-KrAr3DcQDjb+LP+vIf0qLSSgII0m5rNwhncLNHlLaC8=";
+        hash = "sha256-tft0+vcE+LGPrlv4ZBgzmeF66Jf66iTjUr0pdF1vx24=";
         fetchSubmodules = true;
+        leaveDotGit = true;
+        postFetch = ''
+          git -C $out rev-parse --short HEAD > $out/GIT_HASH
+          find "$out" -name .git -print0 | xargs -0 rm -rf
+        '';
       };
 
       passthru.updateScript = gitUpdater {