Very often, all I need from git is to stage all changes, commit them and push to master. I've made two scripts for this. One in bash:

gitapush() {
  if [ $# -eq 0 ];
    echo "Enter message: "
    read message

  if [ -z "$message" ];
    message=$(date +%d-%b-%H:%M)

  git add .
  git commit -m "$message"
  git push origin master

gitapush stands for “git all push” (I guess), and it's pretty dumb:

  1. If argument is provided, use it as message, commit and push (e.g. gitapush fix x)
  2. If argument isn't provided, as for a message.
    1. If a message was entered, commit and push.
    2. If not, generate a message from current date, commit and push.

To achieve a similar thing in Emacs, I use magit:

(defun my-magit-stage-all-and-commit-and-push () (interactive)
       (let ((m (read-string "Commit message: ")))
         (unless (string= "" m)
           (magit-call-git "commit" "-m" m)
           (magit-call-git "push" "origin" "master"))))

(global-set-key (kbd "s-G") 'my-magit-stage-all-and-commit-and-push)

This one doesn't generate an automatic commit message, though. I bound it to Cmd+Shift+G, because Cmd+G is how I open the magit status pane.