3. Git Refs

3.1. Commit Hash

1. SHA1

2. SHA1 collisions

3. Length (40 characters)

4. Using short hashes

5. Generating hash

6. Contains information about whole history

3.2. Refs

• .git/refs/*

3.3. HEAD

• .git/HEAD

3.4. Branches

3.5. Stating Area

3.6. Reset

$ git reset --hard
$ git reset --soft
$ git reset --mixed

3.7. Revert

$ git reset --hard HEAD