How do I clone a git repo by tag name?

Hi,

Looking at the documentation it still lists "Ref Name" as field but in TeamCity 7.1 this is no longer there:

http://confluence.jetbrains.net/display/TCD7/Git+%28JetBrains%29

What field should we be using if we want to checkout source by a particular tag?  Before you could specify the tag in the Ref name like so refs/tags/v5.1.

Thanks,
Jay