#!/bin/bash
BRANCH  ="master"
REPO    ="~/project.git"
TRAGET  ="~/deploy-folder"
LOG     ="~/logs/deploy-master.log"
NOW     =$(date +"%Y-%m-%d-%H:%M:%S")

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