$ git clone -n https://gitee.com/wency_cn/python-tornado.git /var/lib/mock/dist-an23-build-508185-74965/root/chroot_tmpdir/scmroot/python-tornado
Cloning into '/var/lib/mock/dist-an23-build-508185-74965/root/chroot_tmpdir/scmroot/python-tornado'...
$ git fetch origin 1dec6c30e6e76efaf4cab36aa39a02a12f9c944f:KOJI_FETCH_HEAD
From https://gitee.com/wency_cn/python-tornado
 * [new ref]         1dec6c30e6e76efaf4cab36aa39a02a12f9c944f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1dec6c3 Update code from upstream