When running Git in the Windows Subsystem for Linux (also known as "WSL") while accessing a working directory on a regular Windows drive, none of the NTFS protections were active.
Tag: NTFS
ASA-2019-00665 – Git: Files inside the .git directory may be overwritten during cloning via NTFS Alternate Data Streams
Git was unaware of NTFS Alternate Data Streams, allowing files inside the .git/ directory to be overwritten during a clone.