I cloned a specific repo on Github to my local computer. 

I created a new repository on my own github using `git clone <repo url>` and then made changes on my copied repo and uploaded that to my new repo via git push and commit. 

Then the owner of the repo added new files. If I cloned that specific repo it might overwrite my local copy?

How can I update my local file without affecting the changes I've made so far?
What are the commands I can use?