test the kernel contribution process
The build started just fine for me locally:
$ packit srpm
$ mock -r centos-stream-8-x86_64 ./kernel-4.18.0-301.1.gf6b0a748.fc33.src.rpm
...
+ ApplyPatch test.patch
+ local patch=test.patch
+ shift
+ '[' '!' -f /builddir/build/SOURCES/test.patch ']'
Patch1: test.patch
...
Executing(%build): /bin/sh -e /var/tmp/rpm-tmp.HjM7Qv
+ umask 022
+ cd /builddir/build/BUILD
+ cd kernel-4.18.0-301.1.el8
...