diff --git a/doc/build-helpers/fetchers.chapter.md b/doc/build-helpers/fetchers.chapter.md
index 62c38ec4c59e..e5ec5f93888b 100644
--- a/doc/build-helpers/fetchers.chapter.md
+++ b/doc/build-helpers/fetchers.chapter.md
@@ -699,6 +699,9 @@ MSCREATE.DIR  PINBALL.DOC  PINBALL.MID	Sounds	     WAVEMIX.INF
 - `extraPrefix`: Prefix pathnames by this string.
 - `excludes`: Exclude files matching these patterns (applies after the above arguments).
 - `includes`: Include only files matching these patterns (applies after the above arguments).
+- `hunks`: Choose the specified hunks from each file (applies after the above arguments).
+  Note that you can specify a list of numbers or ranges of numbers
+  (for example, `[ 1 2 3 4 ]`, `[ "1-4" ]`, `[ "-4" ]`, or `[ "1-" ]` would all be the same effective range in a patch applying 4 hunks to a single file).
 - `revert`: Revert the patch.
 
 Note that because the checksum is computed after applying these effects, using or modifying these arguments will have no effect unless the `hash` argument is changed as well.