$ git clone -n https://src.fedoraproject.org/rpms/mingw-filesystem.git /var/lib/mock/f45-build-18425-515/root/chroot_tmpdir/scmroot/mingw-filesystem
Cloning into '/var/lib/mock/f45-build-18425-515/root/chroot_tmpdir/scmroot/mingw-filesystem'...
$ git fetch origin a812a9bbd96cac498d3d8321b79e635074468156:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-filesystem
 * [new ref]         a812a9bbd96cac498d3d8321b79e635074468156 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a812a9b Fix setting CMAKE_RC_COMPILER (#2507374)