$ git clone -n https://github.com/xcp-ng-rpms/xen.git /var/lib/mock/v8.3-incoming-7855-22529/root/chroot_tmpdir/scmroot/xen
Cloning into '/var/lib/mock/v8.3-incoming-7855-22529/root/chroot_tmpdir/scmroot/xen'...
$ git reset --hard ad90d65ba06b5df7173bf0663f2958005f904b2c
Downloading SOURCES/xen-4.17.5.tar.gz (6.7 MB)
HEAD is now at ad90d65 Merge pull request #48 from xcp-ng-rpms/nested-virt