$ git clone -n https://src.fedoraproject.org/rpms/openbios.git /var/lib/mock/f39-build-1681007-41025/root/chroot_tmpdir/scmroot/openbios
Cloning into '/var/lib/mock/f39-build-1681007-41025/root/chroot_tmpdir/scmroot/openbios'...
$ git fetch origin ef1c3398b8439b4af5b2ff72091b5df7a0ed9a1d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/openbios
 * [new ref]         ef1c3398b8439b4af5b2ff72091b5df7a0ed9a1d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ef1c339 Update to openbios af97fd7