Help!  I need to recover a branch.  I've been using git with the Bitbucket UI to try and simplify things, but missed a checked checkbox...
What I did:
I created a pull request and merged my feature branch into the dev branch, closing the feature branch (desired outcome).  
I then created a pull request and merged my dev branch into the staging branch (desired), but I missed that the checkbox was still marked to "close branch on merge", which happened (not desired).  
What I want:
I would like to roll back the merge so that I have a dev branch with the feature branch merged into it (with all its commit history, etc). I don't care if the staging branch is dev-branch-less, or not, I don't mind creating the pull request and merging them correctly again if necessary. Is it possible to recover the dev branch with its history now that it has been closed? 
 
     
     
    