### Please describe the problem.

Attempting to clone the git repository produces

    (master) cayley:git-annex% git checkout -f HEAD
    error: unable to create file doc/bugs/fatal:_unable_to_access___39__..__47__..__47__..__47__..__47__C:__92__Users__92____91__...__93____92__annex__92__.git__47__config__39__:_Invalid_argument___40__Windows__41__.mdwn (File name too long)
    fatal: cannot create directory at 'doc/bugs/fatal:_unable_to_access___39__..__47__..__47__..__47__..__47__C:__92__Users__92____91__...__93____92__annex__92__.git__47__config__39__:_Invalid_argument___40__Windows__41__': File name too long

### What steps will reproduce the problem?

I get the above with either

    git clone https://github.com/joeyh/git-annex

or (after this fails) retrying with

    cd git-annex
    git checkout -f HEAD

### What version of git-annex are you using? On what operating system?

I am running git 1.9.0 from git (5f95c9f850b19b368c43ae399cc831b17a26a5ac in the git git repo) on Ubuntu 13.04.