title: Create a pull request from specific commit until now
body: <p>I have used git for a while to push and pull commits and branches, but I'm new to pull requests. 
  I need to create a pull request from our development branch. This pull request needs to contain all commits from a certain point in time up until now. This pull request is for code reviewing purposes. I don't know how to go about this. 
  Any suggestions?
  Thanks in advance.</p>