Reimport exported file and make all the cuts same

It could be done automatically with scripting, but scripting premiere is undocumented and requires a bit of experience.

A workaround is to use the keyboard shortcuts. If you put the reimported clip on a new track in the original timeline you can use the ↓ key to jump to the next cut, then hit shiftctrl/⌘k to add an edit at the playhead across all tracks. Rinse, repeat. You could even map the add edit command to a single key to make it easier, e.g. x. Then its just a matter of hitting ↓then x 500 hundred times. Something like Autohotkey (there's probably an equivalent for those still stuck with a Mac) can automate that process to make it even easier.

Or you could use a less insane workflow. Oops did I say that out loud?