git reset, Demystified: --soft vs --mixed vs --hard

Three flags, one branch pointer, three very different outcomes. See exactly what --soft, --mixed, and --hard do to your branch, your staging area, and your working directory — and why only one of them can actually lose your work.

Git, Under the Hood: An Interactive Tour of How Git Really Works

Stop memorizing Git commands and start understanding them. A hands-on walk through the object store and the pointers on top of it — blobs, trees, commits, branches, and HEAD — with interactive demos you can poke at.