The post-update hook is run after every push.  We've changed this (in $GIT_DIR/hook/post-update) to run git update-server-info, so that it doesn't need
 to be done by hand anymore.
+
+{section: What releases include this commit}
+
+<p>It's occasionally useful to determine which releases include a given commit, typically so you know which branches you need to fix a bug on. Assuming you're interested in commit a56c825f, use the following:
+{code}
+git tag --contains a56c825f | egrep '^V[0-9]*_[0-9]*_[0-9]*$'
+{endcode}