diff --git a/core/dbt/deps/git.py b/core/dbt/deps/git.py
index 4f8c3ba376f..ad9fc837cd2 100644
--- a/core/dbt/deps/git.py
+++ b/core/dbt/deps/git.py
@@ -101,11 +101,14 @@ def _fetch_metadata(
         self, project: Project, renderer: PackageRenderer
     ) -> ProjectPackageMetadata:
         path = self._checkout()
-        # overwrite 'revision' with actual commit SHA
-        self.revision = git.get_current_sha(path)
 
+        # raise warning (or error) if this package is not pinned
         if (self.revision == "HEAD" or self.revision in ("main", "master")) and self.warn_unpinned:
-            warn_or_error(DepsUnpinned(git=self.git))
+            warn_or_error(DepsUnpinned(revision=self.revision, git=self.git))
+
+        # now overwrite 'revision' with actual commit SHA
+        self.revision = git.get_current_sha(path)
+
         partial = PartialProject.from_project_root(path)
         return partial.render_package_metadata(renderer)