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A comment on Linus' reply on Git and SHA-1 collision. Parent comment

Re:Linus' reply on Git and SHA-1 collision by dromen on Friday February 24, 2017 @10:43AM (#13724627)
What do you mean by detectable in the context of Git-as-append-only-log?
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Re:Linus' reply on Git and SHA-1 collision by azernik on Saturday February 25, 2017 @03:19PM (#13733612)
Mirrors that pull down the version with rewritten history will not be able to run a fast-forward (because they will contain commits that are not in the upstream version), and will loudly complain.
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