$ git clone -n https://src.fedoraproject.org/rpms/collectd.git /var/lib/mock/f40-build-764513-123116/root/chroot_tmpdir/scmroot/collectd
Cloning into '/var/lib/mock/f40-build-764513-123116/root/chroot_tmpdir/scmroot/collectd'...
$ git reset --hard fcee6f7d11dd3cea89dedb9fb9dcd648354610dc
HEAD is now at fcee6f7 Rebuild again correctly for xen update