m/^(\S+) (\S+) (\S+)$/ or die "$_ ?";
my ($old, $sha1, $refname) = ($1, $2, $3);
if ($refname =~ m{^refs/tags/(?=debian/)}) {
m/^(\S+) (\S+) (\S+)$/ or die "$_ ?";
my ($old, $sha1, $refname) = ($1, $2, $3);
if ($refname =~ m{^refs/tags/(?=debian/)}) {