$ git clone -n https://github.com/xcp-ng-rpms/xo-lite.git /var/lib/mock/v8.3-incoming-8917-27866/root/chroot_tmpdir/scmroot/xo-lite
Cloning into '/var/lib/mock/v8.3-incoming-8917-27866/root/chroot_tmpdir/scmroot/xo-lite'...
$ git fetch origin d70cab6ba9e29e61b4d96ab2a5051de983489143:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xo-lite
 * [new ref]         d70cab6ba9e29e61b4d96ab2a5051de983489143 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d70cab6 Update to version 0.13.0