$ git clone -n https://src.fedoraproject.org/rpms/ocaml-dose3.git /var/lib/mock/f39-build-1847709-42158/root/chroot_tmpdir/scmroot/ocaml-dose3
Cloning into '/var/lib/mock/f39-build-1847709-42158/root/chroot_tmpdir/scmroot/ocaml-dose3'...
$ git fetch origin f5e4eeda7a23b885896494bee341b9e87db0aab0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-dose3
 * [new ref]         f5e4eeda7a23b885896494bee341b9e87db0aab0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f5e4eed Rebuild for ocaml-ocamlgraph 2.1.0