A Capistrano Recipe using Git as the folder structure, not just the scm.

gistfile1.rb

# you'd obviously have more settings somewhere
set :scm, :git
set :repository, "[email protected]:defunkt/github.git"
set :branch,     "origin/master"

set(:latest_release) {fetch(:current_path)}
set(:release_path)   {fetch(:current_path)}

set(:current_revision)  { capture("cd #{current_path}; git rev-parse --short HEAD").strip }
set(:latest_revision)   { capture("cd #{current_path}; git rev-parse --short HEAD").strip }
set(:previous_revision) { capture("cd #{current_path}; git rev-parse --short HEAD@{1}").strip }

namespace :deploy do
  desc "Deploy the MFer"
  task :default do
    update
    restart
    cleanup
  end

  desc "Setup a GitHub-style deployment."
  task :setup, :except => { :no_release => true } do
    run "git clone #{repository} #{current_path}"
  end
  
  task :update do
    transaction do
      update_code
    end
  end

  desc "Update the deployed code."
  task :update_code, :except => { :no_release => true } do
    run "cd #{current_path}; git fetch origin; git reset --hard #{branch}"
    finalize_update
  end

  namespace :rollback do
    desc "Rolls back to the previously deployed version."
    task :code, :except => { :no_release => true } do
      set :branch, "HEAD^"
      deploy.default
    end
    
    desc "Rolls back to the previously deployed version."
    task :default do
      rollback.code
    end
  end
end