$ git clone -n https://gitee.com/src-opencloudos-rpms/xz.git /var/lib/mock/dist-oc9-build-175072-79866/root/chroot_tmpdir/scmroot/xz
Cloning into '/var/lib/mock/dist-oc9-build-175072-79866/root/chroot_tmpdir/scmroot/xz'...
$ git fetch origin c72fe4645293e3a1e968f84365283a802ad0716a:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/xz
 * [new ref]         c72fe4645293e3a1e968f84365283a802ad0716a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c72fe46 import xz-5.4.7-3.tl4.1