build pilot-xo9b: ensure is in branch before copy

build__pilot-xo9b.sh

@@ -14,6 +14,12 @@ main() {
                 detach='-d'
         fi
 
+        # ensure uses pilot-xo9b branch
+        (
+                cd ./IdHub
+                git checkout pilot-xo9b
+        )
+
         postfix='pilot-xo9b'
         local idhub1="idhub1__${postfix}"
         local idhub2="idhub2__${postfix}"
@@ -30,11 +36,6 @@ main() {
                 rm -f "${idhub2}/db.sqlite3"
         fi
 
-        (
-                cd ./IdHub
-                git checkout pilot-xo9b
-        )
-
         idhub_dc_f="docker-compose__${postfix}.yml"
         docker compose -f ${idhub_dc_f} down -v || true
         make idhub_build \