Probably a really odd thing to revive this thread with,
but I just noticed that Luke’s ceremonial jacket from the end of ANH has a very similar design as the jacket that Greedo wears under his west.

I wonder if they just re-coloured (painted? dyed?) and altered the Greedo jacket somewhat and used it for the Medal ceremony scene to save time and money, and I’m also curious as to whether there is some canon-explanation for them having the same jacket design.
(It’s called the “ceremonial jacket”, but I always got the impression that it was some kind of pilot jacket, which would make some sense for both characters.)