#!/bin/bash
TARGET="/var/www/html/master"
GIT_DIR="/var/www/html/repo.git"
BRANCH="master"

while read oldrev newrev ref
do
	# only checking out the master (or whatever branch you would like to deploy)
	if [[ $ref = refs/heads/$BRANCH ]];
	then
		echo "Ref $ref received. Deploying ${BRANCH} branch to production..."
		git --work-tree=$TARGET --git-dir=$GIT_DIR checkout -f
	else
		echo "Ref $ref received. Doing nothing: only the ${BRANCH} branch may be deployed on this server."
	fi
done