$ git clone -n https://gitee.com/src-opencloudos-rpms/python-tornado.git /var/lib/mock/dist-oc9-build-119525-70589/root/chroot_tmpdir/scmroot/python-tornado
Cloning into '/var/lib/mock/dist-oc9-build-119525-70589/root/chroot_tmpdir/scmroot/python-tornado'...
$ git fetch origin 3c17effcd74b01171ca5a26f67bdcd96127d9b38:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/python-tornado
 * [new ref]         3c17effcd74b01171ca5a26f67bdcd96127d9b38 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3c17eff import python-tornado-6.3.3-6.tl4