Redfish cheatsheet: Add BMC Factory Reset

Change-Id: I54a1c694302230cf97de14f6f96fa676b4035788
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/REDFISH-cheatsheet.md b/REDFISH-cheatsheet.md
index 885d281..3d65f2a 100644
--- a/REDFISH-cheatsheet.md
+++ b/REDFISH-cheatsheet.md
@@ -72,6 +72,14 @@
 
 ---
 
+## BMC factory reset
+Proceed with caution:
+```
+curl -k -H "X-Auth-Token: $token" -X POST https://${bmc}/redfish/v1/Managers/bmc/Actions/Manager.ResetToDefaults -d '{"ResetToDefaultsType": "ResetAll"}'
+```
+
+---
+
 ## Log entry
 Display logging entries:
 ```