$ git clone -n https://github.com/xcp-ng-rpms/xo-lite.git /var/lib/mock/v8.3-incoming-8939-27879/root/chroot_tmpdir/scmroot/xo-lite
Cloning into '/var/lib/mock/v8.3-incoming-8939-27879/root/chroot_tmpdir/scmroot/xo-lite'...
$ git fetch origin d5e48faa3c12151571c33c401ab27c6bf7146f4e:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xo-lite
 * [new ref]         d5e48faa3c12151571c33c401ab27c6bf7146f4e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d5e48fa Update to version 0.13.1