$ git clone -n https://github.com/xcp-ng-rpms/xo-lite.git /var/lib/mock/v8.3-incoming-9446-28190/root/chroot_tmpdir/scmroot/xo-lite
Cloning into '/var/lib/mock/v8.3-incoming-9446-28190/root/chroot_tmpdir/scmroot/xo-lite'...
$ git fetch origin 45b586d0bf501bb02d4af6cf1fed7d077a92bec0:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xo-lite
 * [new ref]         45b586d0bf501bb02d4af6cf1fed7d077a92bec0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 45b586d Update to version 0.15.0