Sha256 would be nice, but this is just a git remote helper. Choice of hash algorithm depends on how you init your git repo: git init --object-format=sha256. It stores the .git dir structure (with sha1 blob filenames by default) on blossom.

Git primarily uses SHA-1 for object hashing under the hood, as confirmed by multiple sources, including discussions on LWN.net and Hacker News. While SHA-256 offers stronger security, Git’s design has historically relied on SHA-1 for efficiency and compatibility. A 2017 discussion noted that Git...