Turns out the issue was the break and inspect from the corporate firewall. Standard global git config fix didn't work, as it seems that as part of the install process, SOAR changes the config key to http.sslcainfo=$SOAR_HOME/etc/cacerts.pem. Modifying that cacerts.pem file to add the full chain of certs you get when navigating to GitHub from a browser on the same network ended up working to get SOAR to install successfully.
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