add git-modes

.gitmodules

@@ -19,3 +19,6 @@
 [submodule "site-lisp/emacs-which-key"]
 	path = site-lisp/emacs-which-key
 	url = https://github.com/justbur/emacs-which-key.git
+[submodule "site-lisp/git-modes"]
+	path = site-lisp/git-modes
+	url = https://github.com/magit/git-modes.git

lisp/init-git.el

@@ -14,6 +14,7 @@
 
 (setq epg-pinentry-mode 'loopback)
 
+(require 'git-modes)
 (with-eval-after-load 'magit
   ;; (require 'forge)