Is your feature request related to a problem?

As of now, it is not possible to use git-lfs without having an http endpoint available, when using lfs=true and running nix flake update, nix will attempt an http connection (hybrid mode)

Proposed solution

Implementation of a pure ssh git lfs fetcher

Alternative solutions

Couldn't find any besides deploying a VPN when only ssh traffic is allowed

Additional context

• related to Support for Git LFS in private repositories #4623

Checklist

• checked latest Nix manual (source)
• checked open feature issues and pull requests for possible duplicates

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