$ git clone -n https://gitee.com/wency_cn/python-tornado_1767162623.git /var/lib/mock/dist-an23-build-502891-74825/root/chroot_tmpdir/scmroot/python-tornado_1767162623
Cloning into '/var/lib/mock/dist-an23-build-502891-74825/root/chroot_tmpdir/scmroot/python-tornado_1767162623'...
$ git fetch origin b1a2bc250bb4c35e12d0bc200c653d8d543a6819:KOJI_FETCH_HEAD
From https://gitee.com/wency_cn/python-tornado_1767162623
 * [new ref]         b1a2bc250bb4c35e12d0bc200c653d8d543a6819 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b1a2bc2 Update code from upstream