tell vim not to remember cursor position for a git commit message

gistfile1.txt

in vimrc
the first section is enable the feature, the last is to auto jump to line 1 if in the git commit message so 
if we set EDITOR=vim and run git commit it will always set insertion cursor at line 1

>>>>>
if has("autocmd")
  augroup fedora
  autocmd!
  "...
  " When editing a file, always jump to the last cursor position
  autocmd BufReadPost *
  \ if line("'\"") > 0 && line ("'\"") <= line("$") |
  \   exe "normal! g'\"" |
  \ endif
  "...
  augroup END
endif
function! GoTopFile()
    exe "normal! 1G"
endfunction
autocmd BufReadPost COMMIT_EDITMSG :call GoTopFile()