Git is planning to switch to SHA-256 soon. This is all great news, but the best thing is the command to convert an existing repo to the new hash. It reads like a shitpost and gets better with each argument:

git convert-repo --to-hash=sha-256 --frobnicate-blobs --climb-subtrees --liability-waiver=none --use-shovels --carbon-offsets

Source: https://lwn.net/SubscriberLink/811068/cfeb6a67b8dfbe47/