What is the significance of SHA-1 (and the move toward SHA-256) in Git’s object model?

Question

Git — Hard

What is the significance of SHA-1 (and the move toward SHA-256) in Git’s object model?

Accepted Answer

Git's object model relies on SHA-1 hashes for content-addressing, ensuring data integrity and deduplication. The transition to SHA-256 is driven by concerns over SHA-1's vulnerability to collisions. This approach enables Git to maintain a robust and secure version control system.