Getting out of trouble by understanding Git
summary
Explains Git as three concrete objects—blob, tree, commit—and shows how refs (branches/tags) point to hashes, why SHA-1 collisions are theoretical, and how pack files and GC compress objects. Demonstrates practical rescues: using reflog recovery after a mistaken git reset, undoing a broken rebase with git reset or rebase --exec running tests, and finding the regression commit with git bisect. Also covers git cat-file, git hash-object, fast‑forward vs --no-ff merges, and hidden objects.
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chapters (8)
- 0:00Introduction to Git troubles
- 3:15Git’s core data structures
- 11:06Understanding refs branches and tags
- 16:10Resets and garbage collection
- 23:00Merging and fast-forwarding
- 28:28Rebasing history cleanly
- 30:39Getting out of trouble with Git
- 37:48Conceptual model of Git
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