Git hook for deployment in production and staging environments

update

BRANCH="$1"
if [  $BRANCH == "refs/heads/master" ]; then
   echo "Deploying changes to production environment."
   GIT_WORK_TREE=/Users/gnrfan/code/git-tests/production-environment git checkout -f
elif [ $BRANCH == "refs/heads/staging" ]; then
   echo "Deploying changes to staging environment."
   GIT_WORK_TREE=/Users/gnrfan/code/git-tests/staging-environment git checkout -f
fi

At the server you create a repo somewhere with "git init /path/to/server/side/repo.git --bare" and then add this file in the hooks/ subfolder. You need to customize the steps for deploying in each environment as needed in your project.