$ git clone -n https://gitee.com/wency_cn/python-tornado_1767785110.git /var/lib/mock/dist-an23-build-504881-74854/root/chroot_tmpdir/scmroot/python-tornado_1767785110
Cloning into '/var/lib/mock/dist-an23-build-504881-74854/root/chroot_tmpdir/scmroot/python-tornado_1767785110'...
$ git fetch origin f867dd4c6d9419ff74ffd1cb617bbbe614897927:KOJI_FETCH_HEAD
From https://gitee.com/wency_cn/python-tornado_1767785110
 * [new ref]         f867dd4c6d9419ff74ffd1cb617bbbe614897927 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f867dd4 Update code from upstream