diff --git a/autoload/fzf/vim.vim b/autoload/fzf/vim.vim
index 44246f7..1cbf8ff 100644
--- a/autoload/fzf/vim.vim
+++ b/autoload/fzf/vim.vim
@@ -603,7 +603,7 @@ endfunction
 " ------------------------------------------------------------------
 
 function! s:get_git_root()
-  let root = split(system('git rev-parse --show-toplevel'), '\n')[0]
+  let root = split(system('git -C ' . shellescape(expand("%:h")) . ' rev-parse --show-toplevel'), '\n')[0]
   return v:shell_error ? '' : root
 endfunction
 
@@ -1181,11 +1181,12 @@ function! s:commits(buffer_local, args)
     return s:warn('Not in git repository')
   endif
 
-  let source = 'git log '.get(g:, 'fzf_commits_log_options', '--color=always '.fzf#shellescape('--format=%C(auto)%h%d %s %C(green)%cr'))
-  let current = expand('%')
+  let current = expand("%:t")
+  let file_path = expand("%:h")
+  let source = 'git -C ' .file_path. ' log '.get(g:, 'fzf_commits_log_options', '--color=always '.fzf#shellescape('--format=%C(auto)%h%d %s %C(green)%cr'))
   let managed = 0
   if !empty(current)
-    call system('git show '.fzf#shellescape(current).' 2> '.(s:is_win ? 'nul' : '/dev/null'))
+    call system('git -C '.fzf#shellescape(file_path).' show '.fzf#shellescape(current).' 2> '.(s:is_win ? 'nul' : '/dev/null'))
     let managed = !v:shell_error
   endif
 
@@ -1216,7 +1217,7 @@ function! s:commits(buffer_local, args)
 
   if !s:is_win && &columns > s:wide
     call extend(options.options,
-    \ ['--preview', 'echo {} | grep -o "[a-f0-9]\{7,\}" | head -1 | xargs git show --format=format: --color=always | head -1000'])
+    \ ['--preview', 'echo {} | grep -o "[a-f0-9]\{7,\}" | head -1 | xargs git -C '.file_path.' show --format=format: --color=always | head -1000'])
   endif
 
   return s:fzf(a:buffer_local ? 'bcommits' : 'commits', options, a:args)