All about git

git_cheatsheet.md

Get latest changes from master to branch

git checkout piash      # gets you "on branch piash"
git fetch origin        # gets you up to date with origin
git merge origin/master

Merge detached head to origin/master

git checkout master && git merge [ref of HEAD]    # ref of HEAD = latest hash of detached head

Restore state to a given commit and erase all newer commits from the record permanently

$ git reset --hard 766f