Coding⏱️ 2 min read📅 2026-05-31

How to Fix: fatal: ambiguous argument 'origin': unknown revision or path not in the working tree

Git diff command issue with unknown revision or path

Quick Answer: Use the correct syntax by separating paths from revisions with '--' and specify a file to compare, e.g. 'git diff origin -- '

The error 'fatal: ambiguous argument 'origin': unknown revision or path not in the working tree' occurs when you're trying to use `git diff origin` without specifying a branch, commit hash, or file path. This command is used to compare the current state of your local repository with the specified origin branch.

🛑 Root Causes of the Error

  • Using `git diff origin` without specifying a branch, commit hash, or file path.

🛠️ Step-by-Step Verified Fixes

Method 1: Specifying a Branch

  1. Step 1: Run `git diff origin ` to compare the current state with the specified branch.

Method 2: Specifying a Commit Hash

  1. Step 1: Run `git diff origin ` to compare the current state with the specified commit.

✨ Wrapping Up

To avoid this error, make sure to specify a branch, commit hash, or file path when using `git diff origin`. You can also use `git status` and `git remote -v` to check the current state of your repository and remote origins.

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