How to tag a Git repo from Xcode 4

It might be silly, but i just can't figure it out:

i added git support for my project after creating it, by closing Xcode and, from terminal:

$ git init
$ git commit -a -m "Initial commit"

When i reopen Xcode, it detects my local repository just fine, except for the fact that i just can't get how to create a tag. I can create a branch, but not a tag. How do you create one from Xcode?

EDIT: Did what @edc1591 suggested, and even created a project with Git support from scratch and i still don't see how to create a tag. There's only a Branch subfolder and the possibility to add one (branch), but nothing about tags...