$ git clone -n https://github.com/xcp-ng-rpms/xen.git /var/lib/mock/v8.3-testing-4424-4554/root/chroot_tmpdir/scmroot/xen
Cloning into '/var/lib/mock/v8.3-testing-4424-4554/root/chroot_tmpdir/scmroot/xen'...
$ git reset --hard 0b1a610ba90823e9e79aab3fd68707bc44550f18
Downloading SOURCES/xen-4.13.4.tar.gz (6.1 MB)
HEAD is now at 0b1a610 Merge branch 'XS-8.3'