Git timemachine micro state

gistfile1.el

(evil-leader/set-key
  "gt" nil
  "gt" 'spacemacs/time-machine-micro-state)

(spacemacs|define-micro-state time-machine
  :doc "[q] quit [p] previous [n] next [c] current"
  :on-enter (git-timemachine)
  :on-exit (git-timemachine-quit)
  :persistent t
  :bindings
  ("c" git-timemachine-show-current-revision)
  ("p" git-timemachine-show-previous-revision)
  ("n" git-timemachine-show-next-revision)
  ("q" nil :exit t)
  )