DNF has a time-based cache policy (and a great sense of humour) so it's possible
that 'dnf makecache' won't actually refresh any caches. Force the cache updates
by passing --refresh.
(From OE-Core rev: b3b0b2e7e710195245f58b4757059906d0cf284e)
Signed-off-by: Ross Burton <ross.burton@intel.com>
(cherry picked from commit a6e34b6aa194a27db9667af1fb0195ac8fb563f5)
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>