git status show me some untracked files. But git describe did not give me dirty flag. Why?
user@host:~$ git status
On branch master
Your branch is ahead of 'origin/master' by 16 commits.
(use "git push" to publish your local commits)
Untracked files:
(use "git add <file>..." to include in what will be committed)
nothing added to commit but untracked files present (use "git add" to track)
user@host:~$ git describe --dirty --tags
v0.3-4-3-geadf778