$ git clone -n https://src.fedoraproject.org/rpms/ocaml-mtime.git /var/lib/mock/f40-build-2057687-49124/root/chroot_tmpdir/scmroot/ocaml-mtime
Cloning into '/var/lib/mock/f40-build-2057687-49124/root/chroot_tmpdir/scmroot/ocaml-mtime'...
$ git fetch origin 15b43c9c9e635f995d4222ff624c80cebcdf7dec:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-mtime
 * [new ref]         15b43c9c9e635f995d4222ff624c80cebcdf7dec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 15b43c9 OCaml 5.1.1 rebuild for Fedora 40