$ git clone -n https://gitee.com/src-opencloudos-rpms/xz.git /var/lib/mock/dist-oc9-build-214823-80792/root/chroot_tmpdir/scmroot/xz
Cloning into '/var/lib/mock/dist-oc9-build-214823-80792/root/chroot_tmpdir/scmroot/xz'...
$ git fetch origin d1996daffdf4aed2373da4a2d821d1896b3f49f4:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/xz
 * [new ref]         d1996daffdf4aed2373da4a2d821d1896b3f49f4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d1996da import xz-5.4.7-7.tl4