we aren't using it on angular at the moment, we have other scripts for publishing to bower. however it is used for other of my projects which can't really clobber past releases like this.

I am not sure I understand the second approach, but it sounds like it's still a "clobber multiple tags" thing, when the use case here is just to update one specific tag.

Why not provide a second option for clobbering all similar tags instead?