# with $finegrained,
# returns bitmask 01 - differ in upstream files except .gitignore
# 02 - differ in .gitignore
+ # if $ignorenamesr is defined, $ingorenamesr->{$fn}
+ # is set for each modified .gitignore filename $fn
local $/=undef;
my @cmd = (@git, qw(diff-tree --name-only -z));
push @cmd, qw(-r) if $finegrained;