$ git clone -n https://src.fedoraproject.org/rpms/ocaml-bos.git /var/lib/mock/f41-build-1098336-20017/root/chroot_tmpdir/scmroot/ocaml-bos
Cloning into '/var/lib/mock/f41-build-1098336-20017/root/chroot_tmpdir/scmroot/ocaml-bos'...
$ git fetch origin 5342eda5065ca2e4752df7680e6ff978339e3cd0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-bos
 * [new ref]         5342eda5065ca2e4752df7680e6ff978339e3cd0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5342eda OCaml 5.2.0 ppc64le fix