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You have got to be kidding me

        git checkout 06e5d848f506564975199164a902af7180e987be

Even a mega-poindexter like Linus Torvalds does not want to go around writing 160-bit ID numbers everywhere

Commits of interest get symbolic names

That's what master is about

You can always write something like

       git checkout master

and it will get whatever commit master refers to

Names like master are called refs

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