History of git irc bot post-commit script
Version 2
git irc bot post-commit script
Tutorial on creating a script to post commits to a IRC channel
post-receive or post-commit depending on how you want to setup your notifications:
#!/bin/sh
echo "---- git commit ----" > /path/to/iihome/irc/#foobar/in
git log -1 > /path/to/iihome/irc/irc.example.com/#foobar/in