Bash tab completion for _git_fetch alias is broken on Git 1.7.7.1

Dear git mailing list,

I'm assigning the `_git_fetch` bash tab completion to the alias `gf`,
with the following command:

    complete -o default -o nospace -F _git_fetch gf

The tab completion then works fine in git 1.7.0.4, but breaks on git
1.7.7.1, with the following error:

    -bash: [: 2: unary operator expected


Here is the related issue on github (the project is a set of git shortcuts):
https://github.com/ndbroadbent/scm_breeze/issues/11


Thanks for your time, I'd really appreciate some help!


Regards,
Nathan B