KeyError: 'msg'
Sentry Issue: [RED-HAT-0P-2JF](https://sentry.io/organizations/red-hat-0p/issues/1674908732/?referrer=github_integration)

```python
        task_results = {"jobs": jobs_results, "event": event_object.get_dict()}
        for v in jobs_results.values():
            if not (v and v["success"]):
                logger.warning(task_results)
                logger.error(v["details"]["msg"])
        return task_results
```

```python
KeyError: 'msg'
  File "packit_service/worker/tasks.py", line 57, in process_message
    event=event, topic=topic, source=source
  File "packit_service/worker/jobs.py", line 477, in process_message
    logger.error(v["details"]["msg"])
```

Affected PR: https://github.com/oamg/convert2rhel/pull/82
diff --git a/packit_service/worker/build/copr_build.py b/packit_service/worker/build/copr_build.py
index 16583e6e..b38ccce0 100644
--- a/packit_service/worker/build/copr_build.py
+++ b/packit_service/worker/build/copr_build.py
@@ -183,7 +183,10 @@ class CoprBuildJobHelper(BaseBuildJobHelper):
                 state=CommitStatus.error,
                 description=f"Submit of the build failed: {ex}",
             )
-            return TaskResults(success=False, details={"error": str(ex)})
+            return TaskResults(
+                success=False,
+                details={"msg": "Submit of the Copr build failed.", "error": str(ex)},
+            )
 
         for chroot in self.build_targets:
             copr_build = CoprBuildModel.get_or_create(
['packit_service/worker/build/copr_build.py']