$ git clone -n https://gitee.com/src-opencloudos-rpms/xz.git /var/lib/mock/dist-oc9-build-125655-75224/root/chroot_tmpdir/scmroot/xz
Cloning into '/var/lib/mock/dist-oc9-build-125655-75224/root/chroot_tmpdir/scmroot/xz'...
$ git fetch origin fc09171a2e0e650befcdbe66ddcf2688284da6f5:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/xz
 * [new ref]         fc09171a2e0e650befcdbe66ddcf2688284da6f5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fc09171 import xz-5.4.7-3.tl4