AFNR#250: set a different git base URL instead of marking as unsuccessful?

In AFNR#250, @guillaume wrote that the Gitweb lister failed to get repositories origins (ssh scheme not supported).

This forge does have public repos available on https but the per-repo pages don't list them:

https://git.gameoftrees.org/diff.git
https://git.gameoftrees.org/got-www.git
https://git.gameoftrees.org/got-portable.git
https://git.gameoftrees.org/got.git

Perhaps we could archive this forge using a different git base URL instead?