Is this the same AGWA that made git-crypt? I look forward to being able to encrypt the repo key to SSH keys, rather than GPG ones.

Yes it is, and they are awesome. git-crypt[0] is a godsend for smaller projects (and maybe larger ones if permissions are granular enough) -- way simpler than sops[1] and other alternative, with native integration via git filters (smudge). I use it on a ton of projects.

[0]: https://www.agwa.name/projects/git-crypt/

[1]: https://github.com/mozilla/sops