Both Ethereum and bitcoin have forking. @Hyperledger Fabric, does not.
Ethereum Foundation
 @ethereum
15 Oct 2017
[URGENT] Update your Ethereum clients! Less than 24 hours until the Byzantium hard fork. goo.gl/V9NCv8
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Replying to @christo4ferris @Hyperledger
I wasn’t aware there’s a public Fabric blockchain?

Oct 15, 2017 · 11:58 AM UTC

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Replying to @stilkov @Hyperledger
forking is a function of the means by which consensus achieved, not public or private
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It’s also the means by which all relevant public chains do it. Not sure comparing a private one is fair.
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