'See :py:meth: xmodule.modulestore.split_mongo.split.SplitMongoModuleStore.clone_course'

def clone_course(self, source_course_id, dest_course_id, user_id, fields=None, revision=None, **kwargs):

    dest_course_id = self._map_revision_to_branch(dest_course_id, revision=revision)
    return super(DraftVersioningModuleStore, self).clone_course(source_course_id, dest_course_id, user_id, fields=fields, **kwargs)
