OK, first I had to suss out git to clear tags so I could test:

git tag -d $(git tag)
[download]

does it.

Now, as assumed, output goes somewhere else, so:

#!/usr/bin/perl

use warnings;
use strict;
my $git;

$git = `git fetch --tags 2>&1`;

print "What's here? --- $git\n";
[download]

sorts it.

Nick