I’ve been using git-crypt⁽¹⁾ which is transparent (you put the patterns you want to encrypt in .gitattributes) and lets you use GPG keys or symmetric keys. And

I’ve been using git-crypt⁽¹⁾ which is transparent (you put the patterns you want to encrypt in .gitattributes) and lets you use GPG keys or symmetric keys. And it's been around for quite a while. ⁽¹⁾https://github.com/AGWA/git-crypt https://github.com/AGWA/git-crypt