Prior to moving it to Google Drive, they started squashing the history into a single commit prior to pushing release tags. The tarballs provided via Google Drive have exactly the same source code. How...
Initially, Google would usually provide access to the tarballs within a couple hours. Lately, they're often taking weeks to get back to us. They're the ones who chose to use this archaic system instead of pushing Git tags and it's their responsibility to handle requests promptly.
1