$ git clone -n https://src.fedoraproject.org/rpms/ocaml-camlimages.git /var/lib/mock/f38-build-side-42-init-devel-773958-27772/root/chroot_tmpdir/scmroot/ocaml-camlimages
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-773958-27772/root/chroot_tmpdir/scmroot/ocaml-camlimages'...
$ git fetch origin 059c619c526531533bc17f834de2b792cabf06c7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-camlimages
 * [new ref]         059c619c526531533bc17f834de2b792cabf06c7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 059c619 Bump release and rebuild