Github woes

I was trying out a friends project the other day and was struggling to download some of the files. Internet couldn't find me the answers but I soon got an email about what to do and this is what I got told to do:

git clone https://github.com/the directory/thesubdirectory/

Cd thesubdirectory

git fetch origin Development

git checkout Development

git submodule update --init

Then it worked a treat, hope this helps others out.