diff --git a/lua/mini/diff/jj.lua b/lua/mini/diff/jj.lua
index 006f5b3..f4de5a0 100644
--- a/lua/mini/diff/jj.lua
+++ b/lua/mini/diff/jj.lua
@@ -52,14 +52,20 @@ local function set_ref_text(buf_id, file_path, cwd)
   local stat = vim.uv.fs_stat(cwd)
   if not stat or stat.type ~= "directory" then return end
 
-  jj(
-    { "file", "show", "-r", "@-", file_path },
-    cwd,
-    ---@param res vim.SystemCompleted
-    vim.schedule_wrap(
-      function(res) MiniDiff.set_ref_text(buf_id, res.code == 0 and res.stdout or {}) end
-    )
-  )
+  ---@param text string | string[] | nil
+  local function set_text(text)
+    vim.schedule(function() MiniDiff.set_ref_text(buf_id, text) end)
+  end
+
+  jj({ "file", "show", "-r", "@-", file_path }, cwd, function(res)
+    if res.code == 0 then return set_text(res.stdout) end
+
+    -- Ignore if file is untracked in `@`.
+    jj({ "file", "list", "-r", "@", file_path }, cwd, function(list)
+      local tracked = list.code == 0 and list.stdout ~= nil and vim.trim(list.stdout) ~= ""
+      set_text(tracked and "" or nil)
+    end)
+  end)
 end
 
 ---@param buf_id integer