Unable to browse blobs on gitweb

I like to link to the Postgres source code and comments in my extension code comments. I use https://git.postgresql.org/gitweb for that, as it seems to be the canonical site for Postgres source code.

Lately, I have encountered HTTP 429 errors when trying to access blobs. For example,

Is this intentional? If so, is there a better domain or site to (roughly) permalink to specific lines of released Postgres code?

Thanks!

-- Chris