$ git clone -n https://github.com/xcp-ng-rpms/kernel.git /var/lib/mock/v8.1-base-1687-1183/root/chroot_tmpdir/scmroot/kernel
Cloning into '/var/lib/mock/v8.1-base-1687-1183/root/chroot_tmpdir/scmroot/kernel'...
$ git reset --hard f1a1780f4cb63729b875e5f81248e5fa25f80b0c
Downloading SOURCES/kernel-4.19.19.tar.gz (161 MB)
HEAD is now at f1a1780 Merge branch 'XS-8.1'