Why does Git still use SHA-1?

Git historically used SHA-1 as a content addressable ID rather than a formal security boundary. Modern Git repositories are transitioning to SHA-256 (objectFormat = sha256).

SHA-1 vs SHA-256: The SHAttered Attack and Modern Security

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SHA-1 vs SHA-256: The SHAttered Attack and Modern Security

SHA-1 vs SHA-256: The SHAttered Attack and Modern Security

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