git cole give unexpected error message

[Sam Ravnborg <sam@ravnborg.org>]

Encountered following minor issue today:

Executed:
sam@mars ~/work $ git clone git://git.kernel.org/pub/scm/lib/klibc/klibc.git viggo
defaulting to local storage area
fatal: unexpected EOF

The errormessage "fatal: unexpected EOF" did not immediately tell me
that the requested git repository did not exists.

But I corrected the path and tried again:
sam@mars ~/work $ git clone git://git.kernel.org/pub/scm/libs/klibc/klibc.git viggo
viggo already exists.

So one can see that git did not clean up after the faulty clone.

It would be nice if git:
1) Displayed a more meaningfull error message
2) Cleaned up so I did not have to do a manual rm -rf viggo


cogito being a nice porcelain gives the git errormessage but manage to
clean up when the clone fails.
So also cogito would benefit from a more descriptive errormessage.

	Sam