From: Egon Elbre <egonelbre@gmail.com>
Date: Fri, 17 Aug 2012 11:42:33 GMT
Subject: Having an invalid HEAD file causes git not to recognize the repository
Message-ID: <CANtNKfp+9HpvWkAO0vrm84oMiJNvjFg9T-UtNQko+ABHhEWj6w@mail.gmail.com>

Having an invalid HEAD file causes git not to recognize the repository
and will cause an invalid message "fatal: Not a git repository (or any
of the parent directories): .git" although there is a .git folder and
everything seems okay in it. Solution was just to change HEAD to a
valid ref/hash.

I ran into this problem when I had a BSOD during a rebase (ignore that
I'm having to use Windows). This meant that only half of the hash got
written into HEAD and all git commands I tried failed.

Not sure whether it's useful to add a better message for this case,
but at least if somebody stumbles on it again, maybe they can find
this text.

+ egon