def add_remote(name, url, opts = {})
      url = url.repo.path if url.is_a?(Git::Base)
      self.lib.remote_add(name, url, opts)
      Git::Remote.new(self, name)
    end
adds a new remote to this repository
url can be a git url or a Git::Base object if it's a local reference

@git.add_remote('scotts_git', 'git://repo.or.cz/rubygit.git')
@git.fetch('scotts_git')
@git.merge('scotts_git/master')

Options:
:fetch => true
:track => <branch_name>