I'm going to change the command in the manual to the read-only:

  git clone https://code.orgmode.org/bzg/org-mode.git

> (and as I was framing this question, found that
> the Worg also needs to be updated.. it still refers to the old clone URL:
> https://orgmode.org/worg/dev/index.html

Worg needs some love, indeed. Worgers, where art thou? :)