$ git clone -n https://github.com/xcp-ng-rpms/kernel.git /var/lib/mock/v8.1-testing-2743-2160/root/chroot_tmpdir/scmroot/kernel
Cloning into '/var/lib/mock/v8.1-testing-2743-2160/root/chroot_tmpdir/scmroot/kernel'...
$ git reset --hard 2b8a16a86258e32cf6fb8e397e4499cc800b625d
Downloading SOURCES/kernel-4.19.19.tar.gz (161 MB)
HEAD is now at 2b8a16a Test kernel to detect memory leaks