I guess it makes sense to remove unencrypted access, but in that case https://git.postgresql.org/gitweb/?p=postgresql.git;a=summary should not advertise supporting the git protocol. I have not seen any announcement either, but that could just be me not paying enough attention.
We definitely still support the unencrypted git protocol. I do recommend using https, but that doesn't mean git shouldn't work. There seems to have been some network issues and the git daemon doesn't do a very good job of handling hung sessions. I've cleaned up for now and it seems to be working again, and we'll do some more digging into what actually was the root cause.