$ git clone -n https://github.com/xcp-ng-rpms/xo-lite.git /var/lib/mock/v8.3-incoming-8947-27879/root/chroot_tmpdir/scmroot/xo-lite
Cloning into '/var/lib/mock/v8.3-incoming-8947-27879/root/chroot_tmpdir/scmroot/xo-lite'...
$ git fetch origin 9879f4386a39adb98e4b7bc267da1f491ea7a5d4:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xo-lite
 * [new ref]         9879f4386a39adb98e4b7bc267da1f491ea7a5d4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9879f43 Update to version 0.13.1