How to toggle "Git blame"?

[FisherDao]

Is there a way to toggle "Git blame"? Like press F1 to start "Git blame", press again to close it.
Or is there a way to figure out if Git blame is running?

[leana8959]

I think you can add a binding to :Git blame to start it, and gq to quit.
It's in the manual, try :help fugitive.

[shadowwa]

I have in my .vimrc that allow me to toggle Git blame with space b

function! s:BlameToggle() abort
  let found = 0
  for winnr in range(1, winnr('$'))
    if getbufvar(winbufnr(winnr), '&filetype') ==# 'fugitiveblame'
      exe winnr . 'close'
      let found = 1
    endif
  endfor
  if !found
    Git blame
  endif
endfunction

nmap <silent> <space>b :call <SID>BlameToggle()<CR>