$ git clone -n https://src.fedoraproject.org/rpms/fbb.git /var/lib/mock/f38-build-side-42-init-devel-622974-26358/root/chroot_tmpdir/scmroot/fbb
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-622974-26358/root/chroot_tmpdir/scmroot/fbb'...
$ git fetch origin a6c8679f9077e0b6b381297e8bdc8eea68140966:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fbb
 * [new ref]         a6c8679f9077e0b6b381297e8bdc8eea68140966 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a6c8679 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild