$ git clone -n https://github.com/xcp-ng-rpms/kernel.git /var/lib/mock/v8.1-testing-2150-1681/root/chroot_tmpdir/scmroot/kernel
Cloning into '/var/lib/mock/v8.1-testing-2150-1681/root/chroot_tmpdir/scmroot/kernel'...
$ git reset --hard 315daeef0714bc983b78c66d05643f0068e8b3e6
Downloading SOURCES/kernel-4.19.19.tar.gz (161 MB)
HEAD is now at 315daee Merge branch 'XS-8.1'