This means we do not need to worry anymore about manually syncing the pre-push
git hook or the Guix-provided git configuration.
* etc/git/gitconfig: Augment configuration template with useful options to
allow for auto-configuration.
* Makefile.am (.git/hooks/pre-push, .git/config): New targets.
(nodist_noinst_DATA): New primary variable holding the above targets.
8b972da068