$ git clone -n https://src.fedoraproject.org/rpms/ocaml-dune.git /var/lib/mock/f38-build-side-42-init-devel-800625-28144/root/chroot_tmpdir/scmroot/ocaml-dune
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-800625-28144/root/chroot_tmpdir/scmroot/ocaml-dune'...
$ git fetch origin 28ee4aaef964d5b282d69fb3e796f5eb096aa979:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-dune
 * [new ref]         28ee4aaef964d5b282d69fb3e796f5eb096aa979 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 28ee4aa Version 3.7.1