$ git clone -n https://github.com/xcp-ng-rpms/xen.git /var/lib/mock/v8.2-testing-4486-4739/root/chroot_tmpdir/scmroot/xen
Cloning into '/var/lib/mock/v8.2-testing-4486-4739/root/chroot_tmpdir/scmroot/xen'...
$ git reset --hard 09fc1bb7338ce3399f0670ebeab73151b774a5c9
Downloading SOURCES/xen-4.13.4.tar.gz (6.1 MB)
HEAD is now at 09fc1bb Add patch to fix XSA 426