def ResetFetch(self, mirror=False):
    if mirror:
      dst = 'refs/heads/*'
    else:
      dst = 'refs/remotes/%s/*' % self.name
    self.fetch = [RefSpec(True, 'refs/heads/*', dst)]
Set the fetch refspec to its default value.
dataset/ETHPy150Open android/tools_repo/git_config.py/Remote.ResetFetch