$ git clone -n https://github.com/xcp-ng-rpms/branding-xcp-ng /var/lib/mock/v9.0-incoming-10758-29294/root/chroot_tmpdir/scmroot/branding-xcp-ng
Cloning into '/var/lib/mock/v9.0-incoming-10758-29294/root/chroot_tmpdir/scmroot/branding-xcp-ng'...
$ git fetch origin 0928ed6764f883f1b9e5d827cb926f4236257a6d:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/branding-xcp-ng
 * [new ref]         0928ed6764f883f1b9e5d827cb926f4236257a6d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0928ed6 8.99