I followed the steps outlined in the worg tutorial about using git to keep track of changes to one's own org data tree.

I still don't understand: how does one go about recovering an earlier version of a file that has been corrupted? Is there a good tutorial on this aspect of using git? I really like this idea, especially since I have several times bodged an org-mode file by foolishly doing this:
C-x C-T *

and making other importune mistakes.

Thank you,

--
Alan

It is undesirable to believe a proposition when
there is no ground whatsoever for supposing it is true.
-- Bertrand Russell