Git hook script for deploying code with push

post-receive

#!/bin/bash
# 
# Deploy on push. Use different strategies on different branches.
# 

function deploy_branch() {
        # set branch path
        case "$1" in
        "master")
                export GIT_WORK_TREE=/home/web/example.com ;;
        "develop")
                export GIT_WORK_TREE=/home/web/test.example.com ;;
        *)
                return 0 ;;
        esac

        # create folder if necessary
        if [ ! -d "$GIT_WORK_TREE" ]; then
                mkdir "$GIT_WORK_TREE"
        fi

        git checkout -f -q $1 # switch branch
        git reset --hard -q # update to HEAD

        echo "NOTICE: $1 branch is deployed to $GIT_WORK_TREE"
}

function refname2branch() {
        # get branch from refname
        echo `echo $1 | cut -d '/' -f 3`;
}

# Get input from terminal or stdin
if [ -n "$1" ]; then
        deploy_branch $(refname2branch $1)
else
        while read oldrev newrev refname
        do
                 deploy_branch $(refname2branch $refname)
        done
fi

Updated to use git reset instead, making sure rm and mv actions also gets applied.