$ git clone -n https://github.com/xcp-ng-rpms/kernel-alt.git /var/lib/mock/v8.1-testing-2160-1702/root/chroot_tmpdir/scmroot/kernel-alt
Cloning into '/var/lib/mock/v8.1-testing-2160-1702/root/chroot_tmpdir/scmroot/kernel-alt'...
$ git reset --hard 6a22c3f38e8a5a4cfa050433680cbd4fa42feef5
Downloading SOURCES/kernel-4.19.19.tar.gz (161 MB)
HEAD is now at 6a22c3f Update patch level to 4.19.128 (#3)