From 99809a021c922ec154bf4cf3290143615a6a1b57 Mon Sep 17 00:00:00 2001
From: Tim Pope <code@tpope.net>
Date: Thu, 19 Jun 2014 16:40:26 -0400
Subject: [PATCH] Don't gratuitously clobber quickfix in :Ggrep

---
 plugin/fugitive.vim | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/plugin/fugitive.vim b/plugin/fugitive.vim
index 916efcd..c8576e2 100644
--- a/plugin/fugitive.vim
+++ b/plugin/fugitive.vim
@@ -1070,14 +1070,16 @@ function! s:Grep(cmd,bang,arg) abort
       if bufname(entry.bufnr) =~ ':'
         let entry.filename = s:repo().translate(bufname(entry.bufnr))
         unlet! entry.bufnr
+        let changed = 1
       elseif a:arg =~# '\%(^\| \)--cached\>'
         let entry.filename = s:repo().translate(':0:'.bufname(entry.bufnr))
         unlet! entry.bufnr
+        let changed = 1
       endif
     endfor
-    if a:cmd =~# '^l'
+    if a:cmd =~# '^l' && exists('changed')
       call setloclist(0, list, 'r')
-    else
+    elseif exists('changed')
       call setqflist(list, 'r')
     endif
     if !a:bang && !empty(list)