Not very clever. Get two leaked copies, and mix them up. Use the credits from copy A, or hell, even chop off 11 milliseconds from them. Then mix and match scenes... even chop off a few ms from some randomly selected scenes. I bet you wouldn't even need the two copies.
They could change the opening credits by 2ms. Or a specific scene.
They could even add a single extra sword 'clang' noise in part of the audio track on one single scene.
There are so many options.