Listing untracked files with git status

When a new directory is added to a git repository, only the directory itself will be listed as an untracked file in the output from git status:

$ git status --porcelain
 M commit_notes.sh
?? notes/rust/

Use the --untracked-files (-u) flag to list individual untracked files within the directory:

$ git status --porcelain -u
 M commit_notes.sh
?? notes/rust/match-operator.md
?? notes/rust/unwrapping.md

Source: man git-status