$ git clone -n https://github.com/xcp-ng-rpms/kernel-alt.git /var/lib/mock/v8.3-incoming-7169-18288/root/chroot_tmpdir/scmroot/kernel-alt
Cloning into '/var/lib/mock/v8.3-incoming-7169-18288/root/chroot_tmpdir/scmroot/kernel-alt'...
$ git reset --hard 6c1b7aa1d83acf9b01da1cea4342981fb52260b2
Downloading SOURCES/kernel-4.19.316.tar.gz (166 MB)
HEAD is now at 6c1b7aa Merge pull request #27 from xcp-ng-rpms/for-8.3/enable-X86_AMD_PLATFORM_DEVICE