Allow releasing from a checked out tag of existing release about rez HOT 2 OPEN

When you checkout a tag, you basically checkout a commit. Which means that you end up in a detached state where there is no branch to work with. From the point of view of rez, it's difficult I think to guess what the user wants to happen. So I'm not sure if we can safely do anything or even come up with a solution that would make sense. We need to balance protecting our users and also have something flexible, which isn't always simple.

I'm not saying we can't do anything, but we'll need to think about it.

Also, if you want to copy a package from one repo to another, you can use rez-cp.

from rez.

Of course, it's just a nice to have really and I think it makes sense.
Some packages you can't rez-cp, if they're set as not relocatable for instance!

from rez.