+Another hook $GIT_DIR/hooks/post-update, if exists and
+executable, is called with the list of refs that have been
+updated. This can be used to implement repository wide cleanup
+task if needed. The exit code from this hook invocation is
+ignored; the only thing left for git-receive-pack to do at that
+point is to exit itself anyway. This hook can be used, for
+example, to run "git-update-server-info" if the repository is
+packed and is served via a dumb transport.
+
+ #!/bin/sh
+ exec git-update-server-info
+