>… you will eventually need to explain that a commit is actually a combination of diffs, along with some other metadata like a pointer to a parent commit. Only

>… you will eventually need to explain that a commit is actually a combination of diffs, along with some other metadata like a pointer to a parent commit. Only that this is completely wrong. A commit is a snapshot of the tree. There are no diffs. There is also no "metadata attached" — the commit is the actual data (!) describing the tree snapshot. Git is a kind of simple content addressable object store storing kind of Merkle tree objects. That would be a proper (abstract) description.