$ git clone -n https://github.com/xcp-ng-rpms/xen.git /var/lib/mock/v8.1-testing-2679-2103/root/chroot_tmpdir/scmroot/xen
Cloning into '/var/lib/mock/v8.1-testing-2679-2103/root/chroot_tmpdir/scmroot/xen'...
$ git reset --hard 060cd3934416295ebca8da99e56e50a1d668eaf0
Downloading SOURCES/xen-4.13.0.tar.gz (6.1 MB)
HEAD is now at 060cd39 Merge branch 'XS-8.1' into 8.1