Did you know that you can set an upstream branch in emacs magit?
When set, you can see all commits you did compared to upstream and can more easily compare to the upstream with this little function:

(with-eval-after-load 'magit
(transient-append-suffix 'magit-diff "r"
'("u" "Diff upstream..HEAD" (lambda ()
(interactive)
(magit-diff-range (concat (magit-get-upstream-branch) "..HEAD"))))))

Pressing `d u` in magit status basically gives you a GitHub pull request view.
#emacs