fix: change removeReferences() to also remove origin

In addition remove unwanted side effects from the function

package.json

@@ -26,6 +26,7 @@
     "@types/uuid": "3.4.5",
     "cli-progress": "2.1.1",
     "commander": "2.20.0",
+    "fast-clone": "1.5.13",
     "moment": "2.24.0",
     "request": "2.88.0",
     "traverse": "0.6.6",

src/connector-client.ts

@@ -25,12 +25,13 @@ import {
   SCThingUpdateResponse,
   SCThingUpdateRoute,
 } from '@openstapps/core';
+import clone = require('fast-clone');
 import * as moment from 'moment';
 import {Bulk} from './bulk';
 import {Client} from './client';
 import {EmptyBulkError, NamespaceNotDefinedError} from './errors';
 
-const V5_VERSION =  0x50;
+const V5_VERSION = 0x50;
 
 /* tslint:disable:no-var-requires */
 /**
@@ -91,15 +92,15 @@ export class ConnectorClient extends Client {
    * @param thing Thing to remove references from
    */
   static removeReferences<THING extends SCThings>(thing: THING): SCAssociatedThingWithoutReferences<THING> {
-    /* tslint:disable:no-any */
-    const thingWithoutReferences: any = {
-      ...{},
-      ...thing,
-    };
-    /* tslint:enable:no-any */
+
+    // tslint:disable-next-line:no-any
+    const thingWithoutReferences = clone<any>(thing);
+
+    delete thingWithoutReferences.origin;
 
     // iterate over all properties
     for (const key in thingWithoutReferences) {
+
       /* istanbul ignore if  */
       if (!thingWithoutReferences.hasOwnProperty(key)) {
         continue;