Hi @Slugsy
.blend files are binary, so Git cannot merge them, and they can grow large over time. If your files get big, I would look at Git LFS to keep the repo healthy.
What you can do is put your Blender project folder under Git and use Sourcetree to track and manage the changes. That works well for keeping a history of your .blend files and any exported assets.
To set it up, I would:
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