ENT-11898: Adjusted setup build host script for AWS environment

Apparently git log -1 never completes due to

WARNING: terminal is not fully functional

So try git rev-parse HEAD instead

Ticket: ENT-11898
Changelog: none

ci/setup-cfengine-build-host.sh

@@ -54,7 +54,7 @@ trap cleanup SIGTERM
 
 
 echo "Using buildscripts commit:"
-git -C buildscripts log -1
+git -C buildscripts rev-parse HEAD
 
 echo "Install any distribution upgrades"
 if [ -f /etc/os-release ]; then