diff --git a/Documentation/git-sh-setup.txt b/Documentation/git-sh-setup.txt
index a2f346ca71..5e5f1c8964 100644
--- a/Documentation/git-sh-setup.txt
+++ b/Documentation/git-sh-setup.txt
@@ -68,6 +68,16 @@ require_work_tree_exists::
 	cd_to_toplevel, which is impossible to do if there is no
 	working tree.
 
+require_clean_work_tree <action> [<hint>]::
+	checks that the working tree and index associated with the
+	repository have no uncommitted changes to tracked files.
+	Otherwise it emits an error message of the form `Cannot
+	<action>: <reason>. <hint>`, and dies.  Example:
++
+----------------
+require_clean_work_tree rebase "Please commit or stash them."
+----------------
+
 get_author_ident_from_commit::
 	outputs code for use with eval to set the GIT_AUTHOR_NAME,
 	GIT_AUTHOR_EMAIL and GIT_AUTHOR_DATE variables for a given commit.