checkout (Vlad::Git)

    # File lib/vlad/git.rb, line 11
      def checkout(revision, destination)
        destination = 'repo' if destination == '.'
        revision = 'HEAD' if revision =~ /head/i

        [ "rm -rf #{destination}",
          "#{git_cmd} clone #{repository} #{destination}",
          "cd #{destination}",
          "#{git_cmd} checkout -f -b deployed-#{revision} #{revision}"
        ].join(" && ")
      end