GitHub Pull Request Showing Commits which are already on the Target Branch

It happens with me sometimes that if I have created a Pull Request which is merged and if I try to create another Pull Request, the commits made in the first Pull Request still shows. Though the code changes in the pull request did not appear, the commits show. For me whenever I create a Pull Request I always check the commits first made only in that Pull Request, so I wanted a way to fix that.

I have an option of Rebase though which technically GitHub should do whenever the Pull Request is merged. But the problem with rebase is that you need to create an extra commit and I usually want to keep my commits as minimum and meaningful as possible.

So what I actually do is to run the below commands which delete the branch from Local as well as Remote and then merged the branch from the Remote Repository.

git push --delete origin develop
git checkout master
git branch -D develop
git checkout -b develop
git fetch upstream
git merge upstream/develop
git push origin develop

I know its not the best solution but it works in my case to keep my Pull Request as clean as possible.