$ git clone -n https://github.com/xcp-ng-rpms/gnutls.git /var/lib/mock/v8.3-incoming-11082-29515/root/chroot_tmpdir/scmroot/gnutls
Cloning into '/var/lib/mock/v8.3-incoming-11082-29515/root/chroot_tmpdir/scmroot/gnutls'...
$ git fetch origin d595a33387f5e7998cb5962a0c5b9a13c19a4484:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/gnutls
 * [new ref]         d595a33387f5e7998cb5962a0c5b9a13c19a4484 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d595a33 WIP: mod: SPECS/gnutls.spec (pcoval/review/master)