$ git clone -n https://src.fedoraproject.org/rpms/ocaml-mlmpfr.git /var/lib/mock/f39-build-1878879-42748/root/chroot_tmpdir/scmroot/ocaml-mlmpfr
Cloning into '/var/lib/mock/f39-build-1878879-42748/root/chroot_tmpdir/scmroot/ocaml-mlmpfr'...
$ git fetch origin de43c89aefe51e0f9aa733773ea6a970fabacd54:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-mlmpfr
 * [new ref]         de43c89aefe51e0f9aa733773ea6a970fabacd54 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at de43c89 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild