def refs(self, type='all', **kwargs):
        """List the references the commit is pushed to.

        Args:
            type (str): The scope of references ('branch', 'tag' or 'all')
            **kwargs: Extra options to send to the server (e.g. sudo)

        Raises:
            GitlabAuthenticationError: If authentication is not correct
            GitlabGetError: If the references could not be retrieved

        Returns:
            list: The references the commit is pushed to.
        """
        path = '%s/%s/refs' % (self.manager.path, self.get_id())
        data = {'type': type}
        return self.manager.gitlab.http_get(path, query_data=data, **kwargs)