How to "get the code from remote to be local"?

[Ando Sonenblick]

I have a branch checked out

Someone rebased it

because history has been rewritten for that branch, I want "get the code that is in the remote to overwrite my local branch".   AKA a hard reset. 

How do I do this?

I want to know what I need to do in source tree that will result in the same thing as:

a) delete the branch locally

b) freshly checkout the branch locally