$ git clone -n https://github.com/xcp-ng-rpms/xo-lite.git /var/lib/mock/v8.3-incoming-9767-28486/root/chroot_tmpdir/scmroot/xo-lite
Cloning into '/var/lib/mock/v8.3-incoming-9767-28486/root/chroot_tmpdir/scmroot/xo-lite'...
$ git fetch origin f631ebe6c0933c46c71ae7bb214a852879538784:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xo-lite
 * [new ref]         f631ebe6c0933c46c71ae7bb214a852879538784 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f631ebe Update to version 0.17.0