Pythonically Access Original File Path

Hello everyone,
I’m trying to implement the Scene Breakdown app from Shotgrid for Unreal and one of the core functions is the ability to scan the scene and identify the paths of objects to then compare against newer publishes for updating. I know very little about Unreal Engine, but from reading the API and trying out some code, it seems like getting the original file path may not be as simple to do programmatically as I might have thought, since on bringing files in Unreal creates a new file path for them so they live under the Content folder.
I also noticed that objects have the option to “Reimport with New File”, which leads me to believe that this function may be related to what I am trying to do. So my question is, can either someone provide some code that will help me achieve what I am trying to do, or ELI5 how to do this in Unreal so I can try and figure out how to script it from there.
Thank you in advance, and sorry if this is an unclear ask!