Seems to be rather straightforward but I just can't get it right. Trying to `pip` install a repo's specific branch. Googling tells me to  

> pip install https://github.com/user/repo.git@branch
 
The branch's name is `issue/34/oscar-0.6` so I did `pip  install https://github.com/tangentlabs/django-oscar-paypal.git@/issue/34/oscar-0.6` but its returning a 404.

How do I install this branch?