Yes, its possible. First, clone your current fork, add original repo as a remote and fetch all data

git clone [email protected]:YOUR-USERNAME/fork.git
git remote add upstream [email protected]:user1/original.git
git fetch --all

Then, create a new branch and add user2's repo as another remote

git checkout -b restructured upstream/main
git remote add user2repo [email protected]:user2/copy.git

Then, cherry-pick user2's commits and your own commits from your fork.

git log user2repo/main
git cherry-pick FIRST_COMMIT^..LAST_COMMIT
git cherry-pick YOUR_FIRST_COMMIT^..YOUR_LAST_COMMIT

Finally push the restructured branch to your fork

git push -u origin restructured

It will create a new branch with the exact structure you want: original base + user2's commits + your commits, all with proper attribution and timestamps

You can then use this restructured branch as the base for your future pull request to the original repository. The commit history will be clean and linear, making it easier to review and merge.

Thank you.