Delete Git history

Hey,

we just started a new module: https://www.drupal.org/project/drupal_content_sync
Accidentally I have committed our existing git history. To have a clean start here at drupal.org we want to start with an empty history.
I just learned that force pushing isnt allowed, so i am not able to overwrite it by my self.

Could you help me with that?


Source: https://www.drupal.org/project/issues/rss/infrastructure