Could you explain how this works? Won't this be putting the .bashrc in $HOME/.myconf/.bashrc, which won't get picked up by bash? (And similar for other dotfiles)
No, since the config alias runs git with the option "--work-tree=$HOME", which tells it that the working directory is your home directory root, i.e. where config files (used to) live.
Anyway it's the proper root for config files, since if you use a .config directory (as seems to be the modern choice) that needs to live in your home directory of course.
Anyway it's the proper root for config files, since if you use a .config directory (as seems to be the modern choice) that needs to live in your home directory of course.