$ git clone -n https://src.fedoraproject.org/rpms/ocamlmod.git /var/lib/mock/f38-build-side-42-init-devel-646503-26423/root/chroot_tmpdir/scmroot/ocamlmod
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-646503-26423/root/chroot_tmpdir/scmroot/ocamlmod'...
$ git fetch origin d4a609d6ec9a5dcd64ad6e425afb1b7c7270c8fe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocamlmod
 * [new ref]         d4a609d6ec9a5dcd64ad6e425afb1b7c7270c8fe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d4a609d Rebuild OCaml packages for F38