$ git clone -n https://gitee.com/wency_cn/python-tornado.git /var/lib/mock/dist-an23-build-507531-74928/root/chroot_tmpdir/scmroot/python-tornado
Cloning into '/var/lib/mock/dist-an23-build-507531-74928/root/chroot_tmpdir/scmroot/python-tornado'...
$ git fetch origin 850e411dda3e5706f1be4097df540c32eac8d59b:KOJI_FETCH_HEAD
From https://gitee.com/wency_cn/python-tornado
 * [new ref]         850e411dda3e5706f1be4097df540c32eac8d59b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 850e411 Update code from upstream