Git remove untracked files

• Run the following command to see which files or directories will be removed on a trial operation:

git clean -dn
// OR `git clean -d -n`

$ git clean -dn
Would remove app/src/main/assets/

• If the output of the above command is what you've expected, run the below command to actually remove these files or directories:

git clean -df
// OR `git clean -d -f`

$ git clean -df
Removing app/src/main/assets/

There are other parameters for cmd git clean, which will remove ignored files, but normally we don't need it.