How to confirm Hotfix Installation on Avamar Proxy Servers?

So we have 90+ Proxy Servers accompanying our multiple Avamar 7.5.1 systems, but no clear records on whether or not a Hotfix (specifically Hotfix # 296322) has been installed on those Proxies. Is there a command that could be leveraged against a Proxy via SSH in order to determine if a Hotfix had previously been installed?