Reproducer:

1) openafs client:
cd /afs/station.com/tmp 
mkdir foo
cd foo
git init
echo "hello" > hello.txt
git add hello.txt
git commit -m "hello"

git status
On branch master
nothing to commit, working tree clean

2) kafs client:
cd /afs/station.com/tmp/foo

git status
On branch master
nothing to commit, working tree clean

3) openafs client:
echo hello2 >> hello.txt
git status
On branch master
Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
	modified:   hello.txt


4) kafs client:

git status
On branch master
nothing to commit, working tree clean


But after I use that file, for example
cat hello.txt 
hello
hello2

git status

On branch master
Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
	modified:   hello.txt