> gitk
-> Visualize current working directory / branch only.
> gitk --reflog
-> VISUALIZE YOUR REFLOG! OMG! Thanks @Stjaertfena
> gitk --all
-> Visualize current working directory & ALL branches (both local and remote).
> gitk --remotes
-> Visualize ALL REMOTE branches only.
> gitk --remotes=origin/cd_*
-> Visualize SPECIFIC (pattern-based!) REMOTE branches only.