(defined $overwrite_version ? <<END_OVERWR : <<END_MAKEFF);
Declare fast forward from $overwrite_version
-[dgit --quilt=$quilt_mode --overwrite-version=$overwrite_version]
+[dgit --quilt=$quilt_mode --overwrite=$overwrite_version]
END_OVERWR
Make fast forward from $i_arch_v->[0]
$clogp, $head, $archive_hash, $i_arch_v, <<END;
$m
-[dgit --overwrite-version=$overwrite_version]
+[dgit --overwrite=$overwrite_version]
END
runcmd @git, qw(update-ref -m), $m, 'HEAD', $r, $head;