As per title.
Examples (courtesy of Ludovic Courtès):
- https://archive.softwareheritage.org/api/1/content/sha1_git:eb99a5bcc11e0297c694493ab539b678344e9846/raw/
- https://archive.softwareheritage.org/api/1/content/sha1_git:ab145065d616c90a8fefc50804ebd697e03562c9/raw/
There are better HTTP status codes for stuff that's available but not accessible for policy reasons.