# File lib/capistrano/recipes/deploy/scm/git.rb, line 132
        def checkout(revision, destination)
          git    = command
          remote = origin

          args = []
          args << "-o #{remote}" unless remote == 'origin'
          if depth = variable(:git_shallow_clone)
            args << "--depth #{depth}"
          end

          execute = []
          if args.empty?
            execute << "#{git} clone #{verbose} #{variable(:repository)} #{destination}"
          else
            execute << "#{git} clone #{verbose} #{args.join(' ')} #{variable(:repository)} #{destination}"
          end

          # checkout into a local branch rather than a detached HEAD
          execute << "cd #{destination} && #{git} checkout #{verbose} -b deploy #{revision}"
          
          if variable(:git_enable_submodules)
            execute << "#{git} submodule #{verbose} init"
            execute << "#{git} submodule #{verbose} sync"
            execute << "#{git} submodule #{verbose} update"
          end

          execute.join(" && ")
        end