As mentioned by @tpope, remove the old test for the autoloaded function
fugitivie#head() and instead use consistently FugitiveHead() everywhere
[delete] %bd command
[add] init.vimspec
[update] init.vimspec
[add] parts.vim
[add] section.vimspec
[add] themes.vimspec
[add] util.vimspec
[delete] vim-vspec