$ git clone -n https://gitee.com/src-opencloudos-rpms/gdm.git /var/lib/mock/dist-oc9-build-252421-84195/root/chroot_tmpdir/scmroot/gdm
Cloning into '/var/lib/mock/dist-oc9-build-252421-84195/root/chroot_tmpdir/scmroot/gdm'...
$ git fetch origin b5b7650ac863a02beaef5c08fb92100a9238451f:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/gdm
 * [new ref]         b5b7650ac863a02beaef5c08fb92100a9238451f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b5b7650 import gdm-44.1-2.tl4.ap.1