$ git clone -n https://gitee.com/src-opencloudos-rpms/python-tornado.git /var/lib/mock/dist-oc9-build-137562-79566/root/chroot_tmpdir/scmroot/python-tornado
Cloning into '/var/lib/mock/dist-oc9-build-137562-79566/root/chroot_tmpdir/scmroot/python-tornado'...
$ git fetch origin 798fdd68600a8bc03da5d38a5a7097e4bf0897aa:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/python-tornado
 * [new ref]         798fdd68600a8bc03da5d38a5a7097e4bf0897aa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 798fdd6 import python-tornado-6.3.3-7.tl4