Git undo. Discard changes and remove untracked files.

Execute 'git status'. Your terminal should show something like this:

$ git status
On branch master
Changes not staged for commit:
  modified:   shop/admin.py
  deleted:    shop/views2.py

Untracked files:
  shop/visitor.py

There are two type of changes:

• Changes not staged for commit: Files that are have changed after being added and committed to the git repository
• Untracked files: New files that have not been added and committed to the git repository before

Discard changes and remove new files (undo)

To undo all work since the last commit, perform these two commands:

git reset --hard
git clean -fd

• git reset --hard = discard changes
• git clean -fd = remove untracked files. -f (force). -d (include directories)

Execute git status again. Your terminal should show something like this:

$ git status
On branch master
nothing to commit, working tree clean

And all is good again.