How to compare and update local repo with remote Github repo?

I was wondering if there are any API's or tricks to find out if my program (visual basic) is different from the one on my repositories master branch.

Also, if it is not, how would I go about updating mine from the new one in the master branch?

Solution

If you're unsure your local project is updated use this command:

git pull origin master

To see differences between your local and remote projects use this:

git diff <local branch> <remote>/<remote branch>