diff --git a/admin/git_hooks/post-commit b/admin/git_hooks/post-commit
index 8be6f34ad..413bc0431 100755
--- a/admin/git_hooks/post-commit
+++ b/admin/git_hooks/post-commit
@@ -5,4 +5,8 @@
 #
 # To enable this hook, make this file executable.
 
-: Nothing
+# see wiki/index.html#GitNotes%20GitAliases for information
+
+git sign "$(git-symbolic-ref HEAD | cut -d/ -f 3-)_signature"
+git publish
+