Probably you could follow this article that enables you to collect a couple of client settings on the deployed target
https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki/Tivoli%20Endpoint%20Manager/page/How%20to%20obtain%20detailed%20Bare%20Metal%20deployment%20activity%20information%20%20that%20can%20be%20used%20to%20create%20reports
In this way each computer that has been created via OS deployment task can have stored the Activity ID and Bare Metal Server ID used for deployment.
Also if you need, these info can be correlated with the Activity History that should be retrieved via Rest API as shown in this thread
regards Luca