$ git clone -n https://gitee.com/wency_cn/python-tornado.git /var/lib/mock/dist-an23-build-494203-74584/root/chroot_tmpdir/scmroot/python-tornado
Cloning into '/var/lib/mock/dist-an23-build-494203-74584/root/chroot_tmpdir/scmroot/python-tornado'...
$ git fetch origin f600c1ee6f05081ee413602d982eb344a16f2a12:KOJI_FETCH_HEAD
From https://gitee.com/wency_cn/python-tornado
 * [new ref]         f600c1ee6f05081ee413602d982eb344a16f2a12 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f600c1e Update code from upstream