How to fetch all tags in the history of selected branch, but only those tags?

Hi,

I found a discrepancy in the documentation around `git-fetch` where it describes a default behaviour (and the described behaviour is what I'd want) but that does not seem to be the actually implemented default behaviour (on 2.21.0). Well, either that or I misunderstand the documentation. Then it might be an indication that the documentation can benefit from clarification.

I described my issue in a question on [Stackoverflow](https://stackoverflow.com/questions/58953115/), but I figured I'd get more informed answers here.

So, the documentation for `git-fetch` says:

However doing `git fetch origin master` I do *not* get any tags. Doing `--tags` on the other hand fetches *all* of the tags, defying the benefit spelled out in " the effect is to fetch tags that point at branches that you are interested in".

What am I missing? Is this indeed a bug (either in implementation or in documentation), or am I missing something obvious. Also, how can I force the desired behaviour (fetch the tags in the history, but only those).

Szabolcs