Disable -- More -- prompt on push/fetch

These commands have slow, potentially verbose output, especially in the
case where pushing triggers a real time deploy.

autoload/fugitive.vim

@@ -3492,7 +3492,7 @@ function! fugitive#Command(line1, line2, range, bang, mods, arg) abort
       let args = s:AskPassArgs(dir) + args
     endif
     let tmp = {
-          \ 'no_more': no_pager,
+          \ 'no_more': no_pager || get(overrides, 'no_more'),
           \ 'line_count': 0,
           \ 'err': '',
           \ 'out': '',
@@ -5980,6 +5980,14 @@ function! fugitive#FetchComplete(A, L, P, ...) abort
   return s:CompleteSub('fetch', a:A, a:L, a:P, function('s:CompleteRemote'), a:000)
 endfunction
 
+function! s:PushSubcommand(...) abort
+  return {'no_more': 1}
+endfunction
+
+function! s:FetchSubcommand(...) abort
+  return {'no_more': 1}
+endfunction
+
 " Section: :Gdiff
 
 augroup fugitive_diff