Misleading URL. Not in my tree, just using github to make it look like it.
These is no actual commit ID b4061a10fc29010a610ff2b5b20160d7335e69bf
in my tree, but when you pass github a SHA1,
it doesn't do any reachability analysis whether that actually exists in the named tree,
so it uses a completely unrelated commit from somebody elses tree on github.
Linus
It is a likely sort of GitHub bug. It's pretty well known that GitHub stores all objects for all forks of a repository in a single git object database and it has added guards to git (some of which have been upstreamed into git itself) to keep it from navigating objects outside of a particular fork.
It's a small, easy to miss detail in this screenshot because you are looking for the lack of something, but under the commit title is where GitHub lists the containing branches and tags of the current fork, and in this case that line is entirely missing.
(GitHub should maybe have a more explicit negative message in this sort of case: "This commit does not seem to be included in any of this fork's branches or tags.")
