$ git clone -n https://github.com/xcp-ng-rpms/xcp-featured.git /var/lib/mock/v8.3-incoming-11237-29598/root/chroot_tmpdir/scmroot/xcp-featured
Cloning into '/var/lib/mock/v8.3-incoming-11237-29598/root/chroot_tmpdir/scmroot/xcp-featured'...
$ git fetch origin 08a6f94ee6cefb80dda165f2f9a44ee0c2e0972b:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/xcp-featured
 * [new ref]         08a6f94ee6cefb80dda165f2f9a44ee0c2e0972b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 08a6f94 Bump release to rebuild against new xapi