git-commit-vandalism/templates/hooks--update

#!/bin/sh
#
# An example hook script to mail out commit update information.
# Called by git-receive-pack with arguments: refname sha1-old sha1-new
#
# To enable this hook:
# (1) change the recipient e-mail address
# (2) make this file executable by "chmod +x update".
#

recipient="commit-list@mydomain.xz"

if expr "$2" : '0*$' >/dev/null
then
	echo "Created a new ref, with the following commits:"
	git-rev-list --pretty "$3"
else
	$base=$(git-merge-base "$2" "$3")
	if [ $base == "$2" ]; then
		echo "New commits:"
	else
		echo "Rebased ref, commits from common ancestor:"
fi
git-rev-list --pretty "$3" "^$base"
fi |
mail -s "Changes to ref $1" "$recipient"
exit 0