untracked files not seen

gistfile1.txt

platform: netbsd-current NetBSD 8.99.51 (XEN3_DOMU) amd64
built git 2.22
        --with-curl=/usr/local \
        --with-expat \
        --without-python \
        --without-tcltk \
in case it matters, filesystem is ext2fs which is exotic, even for a BSD

fetching a random repository (ideally a small one) e.g.

  git clone https://github.com/ttsou/kalibrate.git
  cd kalibrate/
  echo ok > filename
  git status

result is

On branch master
Your branch is up to date with 'origin/master'.

nothing to commit, working tree clean

while it should show `filename` as Untracked