For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:rhabacker:branches:windows:mingw:win32:test/openSUSE_Tumbleweed/home:rhabacker:branches:windows:mingw:win32:test.repo
zypper refresh
zypper install mingw32-filesystem
For openSUSE Leap 15.1 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:rhabacker:branches:windows:mingw:win32:test/openSUSE_Leap_15.1/home:rhabacker:branches:windows:mingw:win32:test.repo
zypper refresh
zypper install mingw32-filesystem