$ git clone -n https://github.com/xcp-ng-rpms/xen.git /var/lib/mock/v8.3-u-tescande1-4697-5068/root/chroot_tmpdir/scmroot/xen
Cloning into '/var/lib/mock/v8.3-u-tescande1-4697-5068/root/chroot_tmpdir/scmroot/xen'...
$ git reset --hard e782970f66e8067a64107fdc47cfeddc7425acf9
Downloading SOURCES/xen-4.13.5.tar.gz (6.5 MB)
HEAD is now at e782970 Q35 support for Xen 4.13.5