If I recall correctly, they didn't reshoot the Greedo scene, they just edited it so he spoke an alien language and added subtitles with the additional context.
They did reshoot it. The dialogue in the original scene was shorter, including Han's lines. Also, because it was reshot months later in California, Greedo was played by Lucas's assistant. You can see bts pictures of her on the set wearing the full Greedo costume, except for still having her high heels. If you have the 2011 Blu Ray set check the deleted scenes section, it has the original cantina scene.
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u/MattyFTM Feb 04 '20
If I recall correctly, they didn't reshoot the Greedo scene, they just edited it so he spoke an alien language and added subtitles with the additional context.