Git repositories with sha256

[koalalorenzo]

Is there an existing issue for this?

• I have searched the existing issues

Description of the bug

When I have a repository that uses sha256 git cliff just stops working

Steps To Reproduce

1. Create a repository that uses sha256 as hash for the commits.
2. Create any commit that can be used to generate a changelog
3. try to generate the changelog

Expected behavior

It should process the changelog properly

Screenshots / Logs

 ERROR git_cliff > Git error: `unknown object format 'sha256'; class=Repository (6); code=Invalid (-21)`

Software information

• Operating system: macOS (15.2 24C101) with nix (24.11)
• Rust version: not installed
• Project version: 2.6.1

Additional context

I noticed that the nix package in unstable has often an outdated version (link). Currently the latest avaiable is 2.8.0 while on nix-unstalbe it is 2.7.0

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[orhun]

Blocked on rust-lang/git2-rs#1090