Capistrano: Deploy from local git repo

I’m a big fan of Git and use it for all my projects.  Not all repos of my projects are hosted remotely (they are onDropbox however) but I still deploy them using Capistrano. Here’s how I do it from my local Git repo:

# deploy.rb

set :application, "app_name"
set :repository,  "/Path/to/local/git/repo/.git"
set :local_repository, "/Path/to/local/git/repo/.git"
set :scm, :git
set :deploy_via, :copy