How can I go back in time for one specific file commit by commit?

To go back in time through a file's commit history in Git, you can use git log and git checkout commands. Here's the concise process:

1. View the file's commit history:

git log --follow -- path/to/your/file

2. Check out a specific previous version:

git checkout <commit_hash> -- path/to/your/file

Or to see the contents without checking out:

git show <commit_hash>:path/to/your/file

To restore to the latest version after viewing:

git checkout HEAD -- path/to/your/file

You can also use git blame to see line-by-line commit history:

git blame path/to/your/file