bug#38044: 27.0.50; There should be an easier way to look at a specific vc commit

[Dmitry Gutov]

On 02.12.2019 17:58, Eli Zaretskii wrote:
> (I do use
> other types of refs with Git, like reflog and stash refs, but those
> are local and are extremely unlikely to appear in a discussion.)

We do see branch names often enough. The current code will frequently 
fail to pick them up, and I think that's unfortunate.

> But if you don't feel that's a good idea, it's fine with me.  It just
> strike me as a mild misfeature that we offer completely unrelated
> words as "revision IDs".

It's fine if we offer something unrelated as the default because 
otherwise we'd simply offer nothing (nil). The user can type over it anyway.

Not offering something useful when we could is more problematic, IMO.