$ git clone -n https://github.com/xcp-ng-rpms/xo-lite.git /var/lib/mock/v8.3-incoming-11469-29776/root/chroot_tmpdir/scmroot/xo-lite
Cloning into '/var/lib/mock/v8.3-incoming-11469-29776/root/chroot_tmpdir/scmroot/xo-lite'...
$ git fetch origin 59851a404857278388e4d4645a11858810817015:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xo-lite
 * [new ref]         59851a404857278388e4d4645a11858810817015 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 59851a4 Update to version 0.20.0