Use fugitive#Execute with --literal-pathspecs

autoload/fugitive.vim

@@ -2049,15 +2049,17 @@ function! s:PathInfo(url) abort
     let [_, ftime] = s:TreeInfo(dir, commit)
     let entry = [ftime, '040000', 'tree', '', -1]
   elseif commit =~# '^:\=[0-3]$'
-    let [lines, exec_error] = s:LinesError([dir, 'ls-files', '--stage', '--', path])
-    if exec_error || empty(lines)
+    let result = fugitive#Execute(['--literal-pathspecs', 'ls-files', '--stage', '--', path])
+    let line = result.stdout[0]
+    if result.exit_status || empty(line)
       return [-1, '000000', '', '', -1]
     endif
     let newftime = getftime(fugitive#Find('.git/index', dir))
-    if len(lines) > 1
+    if !empty(get(result.stdout, 1, ''))
+      " Multiple files reported for one path, assume path is a directory
       let entry = [newftime, '040000', 'tree', '', -1]
     else
-      let [info, filename] = split(lines[0], "\t")
+      let [info, filename] = split(line, "\t")
       let [mode, sha, stage] = split(info, '\s\+')
       let entry = [newftime, mode, 'blob', sha, -2]
     endif