$ git clone -n https://gitee.com/src-opencloudos-rpms/xz.git /var/lib/mock/dist-oc9-build-175078-79867/root/chroot_tmpdir/scmroot/xz
Cloning into '/var/lib/mock/dist-oc9-build-175078-79867/root/chroot_tmpdir/scmroot/xz'...
$ git fetch origin a7f9bbbccf317b3f9f91fdc50831e1ab21c40308:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/xz
 * [new ref]         a7f9bbbccf317b3f9f91fdc50831e1ab21c40308 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a7f9bbb import xz-5.4.7-5.tl4