[formerly_proven]

git has been using the hardened variant of SHA-1 for ages, so the shattered.io files haven't had that effect for a long time.

Edit: Since git 2.13, released about a month after SHAttered was published in 2017: https://github.com/git/git/blob/master/Documentation/RelNote...

[fjdhdhdhfhfhf]

A hardened variant which to this day still has not been documented anywhere.

Really disappointing and terrible for interop.

[namibj]

I think IPFS's IPLD facility for integrating git"s blockchain has it documented as part of discussions on how to offer splitting of git objects as they naturally can be gigabytes.