This isn't exactly what you are looking for. But this is what we use to handle our tagging and deployment to staging/production. http://github.com/apinstein/git

This isn't exactly what you are looking for. But this is what we use to handle our tagging and deployment to staging/production. http://github.com/apinstein/git-deployment http://github.com/apinstein/git-deployment. It's a capistrano multi environment recipe that automates a lot of the tasks.