diff --git a/src/frequenz/repo/config/cli/version/mike/info.py b/src/frequenz/repo/config/cli/version/mike/info.py
index 3e13e74b..1879ce49 100644
--- a/src/frequenz/repo/config/cli/version/mike/info.py
+++ b/src/frequenz/repo/config/cli/version/mike/info.py
@@ -31,6 +31,8 @@
 from .... import version
 from ....mkdocs import mike
 
+_logger = logging.getLogger(__name__)
+
 
 class GitHubActionsFormatter(logging.Formatter):
     """A formatter for GitHub Actions."""
@@ -60,6 +62,11 @@ def format(self, record: logging.LogRecord) -> str:
 
 def _output_gha_vars(mike_version: mike.MikeVersionInfo) -> None:
     """Output mike version information as GitHub Action variables."""
+    _logger.debug("Outputting mike version information as GitHub Action variables:")
+    _logger.debug("  title: %r", mike_version.title)
+    _logger.debug("  version: %r", mike_version.version)
+    _logger.debug("  aliases: %r", " ".join(mike_version.aliases))
+
     gha.set_output("title", mike_version.title)
     gha.set_output("version", mike_version.version)
     gha.set_output("aliases", " ".join(mike_version.aliases))
@@ -150,6 +157,7 @@ def _get_tags(repository: str) -> list[str]:
             .splitlines()
         )
 
+    _logger.debug("Got tags: %r", tags_str)
     return tags_str
 
 
@@ -183,6 +191,7 @@ def _get_branches(repository: str) -> list[str]:
             .decode("utf-8")
             .splitlines()
         )
+    _logger.debug("Got branches: %r", branches_str)
     return branches_str