Note that the .zip file does not come with the .git directory in it (at least from BitBucket -- I don't know how github or gitlab behave in this respect) so there's no actual repo behind it; just ...

Previously available on BitBucket Server, Git Large File Storage now reaches Bitbucket Cloud, Atlassian’s cloud-based code management solution, writes Atlassian engineer Szilard Szasz-Toth.