$ git clone -n https://github.com/xcp-ng-rpms/kernel-alt.git /var/lib/mock/v8.1-testing-2088-1514/root/chroot_tmpdir/scmroot/kernel-alt
Cloning into '/var/lib/mock/v8.1-testing-2088-1514/root/chroot_tmpdir/scmroot/kernel-alt'...
$ git reset --hard 984749ccf7c666807c5d6c9fc2204b2df805ed7a
Downloading SOURCES/kernel-4.19.19.tar.gz (161 MB)
HEAD is now at 984749c Better update handling regarding grub configuration