If you try git remote -v
you'll notice that origin
points to your fork and not to the original repository.
In order to get changes from the original one, you should add a new remote:
git remote add upstream <URL>
and then pull changes from that remote:
git fetch upstream
Now if you show the remotes again, you should have something like:
$ git remote -v
origin https://github.com/... (fetch)
origin https://github.com/... (push)
upstream https://github.com/... (fetch)
upstream https://github.com/... (push)
Note that the name upstream
is not special, you can set it to whatever you want.