Recover deleted branches after git push -f --mirror

I have made a huge misstake. I managed to delete several branches in origin by using

git push -f --mirror

Is there any way i can recover those branches. Im pretty sure they where only on the remote origin repo. 

If it is possible, you would have to contact private Support at https://github.com/contact so they could take a look at your repository and work with you.

I hope that helps!