function! asyncomplete#sources#gitcommit#completor(opt, ctx) abort
    let l:col = a:ctx['col']
    let l:typed = a:ctx['typed']

    let l:kw = matchstr(l:typed, '\v\S+$')
    let l:kwlen = len(l:kw)

    let l:startcol = l:col - l:kwlen

    let l:matches = [
        \ "bugfix: ", "feature: ", "[WIP] ", "fixup! "
        \ ]

    call asyncomplete#complete(a:opt['name'], a:ctx, l:startcol, l:matches)
endfunction