Just revert the revert. So by clicking the revert button you will have created a new PR (your step 2). Once this is merged, you will have the option to revert this, which will create a new branch with all your changes back in. You can then pull this, make changes to it (if needed) and create a new PR. You will lose all the commit messages on Github, but all file changes will still be around. Good to refer to your original branch and reverts in the new PR.
Anything to avoid a complicated rebase or force pushing to master.