Add more customizable details for comment messages

docs/configuration/index.md

@@ -411,8 +411,13 @@ jobs. By default, no message is posted on job failure.
 
 To prevent duplication,  Packit posts a comment only when its content differs from the previous comment in the specific 
 pull request or commit.
-To include dynamic content, you can use the `{commit_sha}` placeholder, which will be automatically replaced with 
-the actual commit SHA provided by Packit (consider using this in relation to the duplication of comments). 
+To include dynamic content, you can use multiple placeholders which will be automatically replaced (consider using this in relation to the duplication of comments):
+
+  - `{commit_sha}`: replaced with the actual commit SHA provided by Packit
+  - `{logs_url}: replaced with the url to the service's logs, the service can be Copr, Koji or Testing Farm depending on the Packit job
+  - `{packit_dashboard_url}: replaced with the Packit dashboard url for the job
+  - `{external_dashboard_url}: url to the service dashboard, the service can be Copr, Koji or Testing Farm depending on the Packit job
+
 You can use this also e.g. to tag a user/namespace that should be notified about the failure.
 
 Example: