code: def create_fork(self):
          
          headers, data = self._requester.requestJsonAndCheck(
              "POST",
              self.url + "/forks"
          )
          return Gist(self._requester, headers, data, completed=True)
docs: :calls: `POST /gists/:id/forks <http://developer.github.com/v3/gists>`_
          :rtype: :class:`github.Gist.Gist`