In the Eclipse client, open the stream. On the button top left with the stream name click the triangle. Select Show>Operation History

Please look here: https://jazz.net/forum/questions/267038/how-to-get-operationhistory-of-the-stream-programmatically-using-rtc-api

There is no official API for retrieving this information.
Nothing should really stop you from trying to do what the Operation History does however (which is not official API).

Note: This is pseudo-code giving you some rough direction:

ParmsGetWorkspaceHistory parms = new ParmsGetWorkspaceHistory();
parms.workspaceId = uuidOfStream;

IScmRichClientRestService scmService = (IScmRichClientRestService) ((IClientLibraryContext) repository).getServiceInterface(IScmRichClientRestService.class);
ScmWorkspaceHistory workspaceHistory = scmService.postGetWorkspaceHistory(parms);

<iterate across workspaceHistory.getHistoryEntries()>

   ScmWorkspaceHistoryEntry workspaceHistoryEntry = (ScmWorkspaceHistoryEntry) workspaceHistory.getHistoryEntries().get(i);
   ScmWorkspaceOperationDescription desc = workspaceHistoryEntry.getDescription();
            @SuppressWarnings("unchecked") // Safe to cast per Javadoc
            List<ScmComponentOperationDescription> componentOperations = desc.getComponentDescriptions();
            for (ScmComponentOperationDescription componentOp : componentOperations) {
               // check if componentOp.getOperation() == OperationKind.REMOVE_COMPONENT
                  ScmComponent component = componentOp .getComponent()
                  String componentName = component.getName();
             }



For iterating across the entire history:
IScmRichClientRestService.postGetWorkspaceHistory() will not return the entire history as that may be too large. To get all the data you will need to make multiple calls, paging through the results. If the return value has ScmWorkspaceHistory.getNextPage() non-null and non-empty, then you pass that along as an argument using ParmsGetWorkspaceHistory.pageToken to get subsequent pages.