PKGBUILD for git-good
You will need node and npm. Node and npm are not marked as makedepends as there are many ways to aquire these: such as nvm (or other version managers), system packages or "standalone".
Run makepkg (might need makepkg --cleanbuild if the cloned repository is acting up..) to build/generate package file. This might take a while as we probably need to compile nodegit. Then install with pacman -U git-good-[version]-[arch].pkg.tar.zst