Squash multiple push in git

And my way of squashing multiple push is (perhaps you pushed to your own branch many commits and now you wish to do a pull request and you don't want to clutter them with many commits which you have already pushed). The way I do that (no other simpler option as far as I can tell is).

1. Create new branch for the sake of squash (branch from the original branch you wish to pull request to).
2. Push the newly created branch.
3. Merge branch with commits (already pushed) to new branch.
4. Rebase new branch and squash.
5. Push new branch.
6. Create new pull request for new branch which now has single commit.

Example:

git checkout branch_you_wish_to_pull_request_to
git checkout -b new_branch_will_have_single_squashed_commit
git push -u new_branch_will_have_single_squashed_commit
git merge older_branch_with_all_those_multiple_commits
git rebase -i (here you squash)
git push origin new_branch_will_have_single_squashed_commit

You can now pull request into branch_you_wish_to_pull_request_to