Put the scripts in your $PATH somewhere, so you can run 'git-pr' and 'git-fwd-merge' without specifying the paths. Git will recognise this, and allow you to use 'git pr' from any directory.
In order to merge a Pull Request, you need at least two remotes:
git remote -v
The names of the remotes are not important, as the script tries to detect the GitHub remote.
If your output doesn't look like this, then add a remote like this:
git remote add upstream https://git-wip-us.apache.org/repos/asf/cloudstack.git git remote add github https://github.com/apache/cloudstack.git
A script was developed to make this an automated and easy process.