error: pathspec did not match any file(s) known to git

Common causes

• Trying to checkout a branch that doesn't exist locally — you need to fetch it first
• The branch name has a typo or uses the wrong case
• The remote branch exists but you haven't run git fetch yet
• Trying to checkout a file path that Git doesn't track

How to fix it

1. Fetch all remote branches first: git fetch --all
2. List available branches: git branch -a
3. Checkout with the correct remote tracking name: git checkout -b <branch> origin/<branch>
4. If the file doesn't exist yet, it can't be checked out — verify the path

Example

Running git checkout feature/login without fetching from remote first