4.15.0-24.26) is not available, but a newer one is (4.15.0-46.49). We redirected you there.
/usr/i686-w64-mingw32/include/cmnquery.h is in mingw-w64-i686-dev 3.2.0-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/i686-w64-mingw32/include/../../share/mingw-w64/include/cmnquery.h