$ git clone -n https://src.fedoraproject.org/rpms/mingw-filesystem.git /var/lib/mock/f42-build-side-1-3535121-46552/root/chroot_tmpdir/scmroot/mingw-filesystem
Cloning into '/var/lib/mock/f42-build-side-1-3535121-46552/root/chroot_tmpdir/scmroot/mingw-filesystem'...
$ git fetch origin 220a8dc22f665b633547d1d302f52dcc85862375:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-filesystem
 * [new ref]         220a8dc22f665b633547d1d302f52dcc85862375 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 220a8dc Re-add target bin dir to PATH