$ git clone -n https://src.fedoraproject.org/rpms/ocaml-merlin.git /var/lib/mock/f38-build-side-42-init-devel-923722-28737/root/chroot_tmpdir/scmroot/ocaml-merlin
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-923722-28737/root/chroot_tmpdir/scmroot/ocaml-merlin'...
$ git fetch origin 995f538d66e80af0d12aad47c503aa3f75d02916:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-merlin
 * [new ref]         995f538d66e80af0d12aad47c503aa3f75d02916 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 995f538 Rebuild OCaml packages for F38