How to Update .pak Chunk Files (without using ChunkDownloader)

I am trying to update my .pak files (for version control) myself without using ChunkDownloader. I am creating different chunks, and only want to update the chunks that changed.

But here is the problem. Every time I package the game, the main .pak chunks (such a pak0) change, EVEN THOUGH I DIDN’T CHANGE ANYTHING! So here is the process…

Package game → I don’t change anything → Package game again → main .pak file sizes change

How do I determine what .pak files really changed? I obviously need to know that, otherwise version control is basically pointless…

Did you find a solution ?

I am also interested in this!
How are we supposed to know which pak chunk is new when they change size?