$ git clone -n https://gitee.com/src-opencloudos-rpms/xz.git /var/lib/mock/dist-oc9-build-214893-80804/root/chroot_tmpdir/scmroot/xz
Cloning into '/var/lib/mock/dist-oc9-build-214893-80804/root/chroot_tmpdir/scmroot/xz'...
$ git fetch origin 4b73b6ce00ea91bb948df2c099d25aa1526e2073:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/xz
 * [new ref]         4b73b6ce00ea91bb948df2c099d25aa1526e2073 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4b73b6c import xz-5.4.7-8.tl4