$ git clone -n https://github.com/xcp-ng-rpms/xen.git /var/lib/mock/v8.3-testing-4298-4358/root/chroot_tmpdir/scmroot/xen
Cloning into '/var/lib/mock/v8.3-testing-4298-4358/root/chroot_tmpdir/scmroot/xen'...
$ git reset --hard a2a59a7aca33114b86d88276120ac83a9ed689e7
Downloading SOURCES/xen-4.13.4.tar.gz (6.1 MB)
HEAD is now at a2a59a7 Merge branch 'XS-8.3'