$ git clone -n https://src.fedoraproject.org/rpms/ocaml-react.git /var/lib/mock/f39-build-2472879-61494/root/chroot_tmpdir/scmroot/ocaml-react
Cloning into '/var/lib/mock/f39-build-2472879-61494/root/chroot_tmpdir/scmroot/ocaml-react'...
$ git fetch origin 234eacd1d2171007c29d170c746000c13d1b570a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-react
 * [new ref]         234eacd1d2171007c29d170c746000c13d1b570a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 234eacd Bump and rebuild