$ git clone -n https://github.com/xcp-ng-rpms/xo-lite.git /var/lib/mock/v8.3-incoming-8919-27866/root/chroot_tmpdir/scmroot/xo-lite
Cloning into '/var/lib/mock/v8.3-incoming-8919-27866/root/chroot_tmpdir/scmroot/xo-lite'...
$ git fetch origin 6fad63f7b25616a71640e6e858049ab8913bdc63:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xo-lite
 * [new ref]         6fad63f7b25616a71640e6e858049ab8913bdc63 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6fad63f Merge pull request #18 from xcp-ng-rpms/gdy-v0.13.0