$ git clone -n https://github.com/xcp-ng-rpms/xcp-featured.git /var/lib/mock/v8.3-u-psafont2-9738-28450/root/chroot_tmpdir/scmroot/xcp-featured
Cloning into '/var/lib/mock/v8.3-u-psafont2-9738-28450/root/chroot_tmpdir/scmroot/xcp-featured'...
$ git fetch origin 895d00492dbbcd39b069b432cf7e2b7dfe13880e:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xcp-featured
 * [new ref]         895d00492dbbcd39b069b432cf7e2b7dfe13880e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 895d004 bump release for test build