+open U, "|git update-ref -m 'dgit bad commit fixup' --stdin" or die $!;
+
+if ($real) {
+ $!=0; $?=0;
+ my $bare = `git rev-parse --is-bare-repository`;
+ die "$? $!" if $?;
+ if ($bare eq 'false') {
+ print "detaching your HEAD\n" or die $!;
+ system 'git checkout --detach' and die "$! $?";
+ }
+}
+
+for my $up (@updates) {
+ my ($ref, $old, $new) = @$up;
+ my $otherref = $ref;
+ $otherref =~ s{^refs/}{};
+ if ($real) {
+ print U <<END or die $!;
+create refs/dgit-badcommit/$otherref $old
+update $ref $new $old
+END
+ } else {
+ print U <<END or die $!;
+update refs/dgit-badfixuptest/$otherref $new
+END
+ }
+}
+
+$?=0; $!=0;
+close U or die "$? $!";
+die $? if $?;
+
+print Dumper(\%count);
+
+if ($real) {
+ print "old values saved in refs/dgit-badcommit/\n" or die $!;
+} else {
+ print "testing output saved in refs/dgit-badfixuptest/\n" or die $!;
+}