e.g.
```
root@wintermute /u/src# /usr/local/bin/git -C /usr/src show -s --format=%ct HEAD
fatal: detected dubious ownership in repository at '/usr/src'
To add an exception for this directory, call:
git config --global --add safe.directory /usr/src
root@wintermute /u/src# /usr/local/bin/git -c safe.directory=/usr/src -C /usr/src show -s --format=%ct HEAD
1741695465
root@wintermute /u/src#
```