Knowing which command to type gets you through a tutorial. Understanding what Git is actually doing gets you through your career.
There’s a difference between memorizing commands and seeing your project the way Git does — as a series of saved states connected by hashes. When that mental model clicks, you stop reacting to Git and start reasoning with it. Commands that used to feel unpredictable become obvious. Situations that used to feel dangerous become navigable. You might forget the exact syntax after a few months. You will never forget how Git thinks.
This is the first course in a three-part series. It covers one thing entirely: understanding how Git works from the inside out.
What you will understand by the end:
You will start with Git’s object model — the blobs, trees, and commit objects that Git creates every time you stage and commit. You will see how these objects are named after their own content using SHA hashes, how a commit is nothing more than a snapshot of a folder at a point in time, and how Git avoids storing duplicate content entirely.
From there, you will learn how references work — HEAD, branches, and tags — and how they are just text files containing a hash. When you understand that, the detached HEAD state stops being frightening.
Then comes the three-tree model: the work tree (your project folder), the index tree (the staging area), and the HEAD tree (your last commit). Git’s entire logic — `git add`, `git diff`, `git restore`, `git commit` — is just moving content between these three trees. Once you see that, every command has an obvious purpose.
The AI Era Angle
AI tools can write Git commands for you, and often write them correctly. The limiting factor isn’t the AI — it’s your ability to evaluate what it gives you. You don’t know what you don’t know. Without deep understanding, you can’t catch a wrong answer, spot a flawed suggestion, or steer toward the right solution. You become the liability in that interaction, not the asset.
This course gives you the understanding that lets you work with AI tools effectively, not just alongside them blindly.
What makes this course different?
Most Git courses teach you commands. This one teaches you the system underneath the commands. Not as a curiosity — because it changes how you think about everything that comes after: history management, collaboration, and the judgment calls that separate a developer who uses Git from one who understands it.
