Git hook that prevents commits to master

pre-commit

#!/bin/sh
#
# Git hook that prevents commits to master
# use --no-verify to bypass this hook
# ex: git commit -m "init commit" --no-verify

branch=`git symbolic-ref HEAD`
if [ "$branch" = "refs/heads/master" ]; then
    echo "Direct commits to the branch master are not allowed"
    exit 1
fi