[bounty] Shallow Clone a Tag

[coolaj86]

I'd like to be able to point to an https url such as https://git.coolaj86.com/greenlock.js retrieve a list of branches and tags, such as v.2.2 and v2.2.3, and then shallow clone that tag.

I'd like to know

A) if this is already possible
B) what it would cost for it to be built if it isn't