Some time ago i posted how you can connect to a spine or leaf switch -> Connect to a leaf/spine switch
With the introduction of NX-OS, the syntax changed a bit. You have now first to drop back to the bash shell and then you can attach the switches. Password is still the same as for the APIC.
apic1# bash admin@apic1:~> attach leaf01 This command is being deprecated on APIC controller, please use NXOS-style equivalent command # Executing command: ssh leaf01 -b 10.127.240.1 Password: Cisco Nexus Operating System (NX-OS) Software TAC support: http://www.cisco.com/tac Copyright (c) 2002-2016, Cisco Systems, Inc. All rights reserved. The copyrights to certain works contained in this software are owned by other third parties and used and distributed under license. Certain components of this software are licensed under the GNU General Public License (GPL) version 2.0 or the GNU Lesser General Public License (LGPL) Version 2.1. A copy of each such license is available at http://www.opensource.org/licenses/gpl-2.0.php and http://www.opensource.org/licenses/lgpl-2.1.php leaf01#
There is also the possibility to directly run show commands from the APIC.
Run Commands on the Fabric Switches from your APIC