git tips

To list untracked files
```
git ls-files --others --exclude-standard
```
If you need to pipe the output to xargs, it is wise to mind white spaces using git ls-files -z and xargs -0:
```
git ls-files -z -o --exclude-standard | xargs -0 git add
```
Nice alias for adding untracked files:
```
au = !git add $(git ls-files -o --exclude-standard)
```
Delete untracked files:
```
git clean -dfx
```