$ git clone -n https://github.com/xcp-ng-rpms/xcp-featured /var/lib/mock/v8.3-u-psafont1-10495-29051/root/chroot_tmpdir/scmroot/xcp-featured
Cloning into '/var/lib/mock/v8.3-u-psafont1-10495-29051/root/chroot_tmpdir/scmroot/xcp-featured'...
$ git fetch origin 4275ac0b346aac08afd10cf5c516104eb8aefaea:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xcp-featured
 * [new ref]         4275ac0b346aac08afd10cf5c516104eb8aefaea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4275ac0 bump release for test build