Before calling mysub($args)
$VAR1 = {'baz' => 2,'foo' => 1};

Inside mysub()
$VAR1 = {'baz' => 2,'foo' => 101};

Inside othersub()
$VAR1 = {'foo' => 101};

After calling mysub($args)
$VAR1 = {'baz' => 2,'foo' => 1};