Use GitHub Desktop to get GitHub projects

Find the project's https git file in the home page of the project.

e.g. https://github.com/PrismLibrary/Prism-Samples-Wpf.git

Open Git Shell

In the Git shell, move (and/or create) the folder you will download the project.

run: git clone https://github.com/PrismLibrary/Prism-Samples-Wpf.git

The Git shell will download the whole project into the folder.

Launch Git Desktop

Click +

Choose 'Add' and input the client folder with project name.

Done