$ git clone -n https://github.com/xcp-ng-rpms/kernel-alt.git /var/lib/mock/v8.3-incoming-6009-11270/root/chroot_tmpdir/scmroot/kernel-alt
Cloning into '/var/lib/mock/v8.3-incoming-6009-11270/root/chroot_tmpdir/scmroot/kernel-alt'...
$ git reset --hard 71f0d531b30340a3551b192af0bda4f31c0616c3
Downloading SOURCES/kernel-4.19.19.tar.gz (161 MB)
HEAD is now at 71f0d53 Merge pull request #20 from xcp-ng-rpms/bin-updategrub