diff --git a/extensions/git/src/historyProvider.ts b/extensions/git/src/historyProvider.ts
index 80d57a1beac..40d423eb7f4 100644
--- a/extensions/git/src/historyProvider.ts
+++ b/extensions/git/src/historyProvider.ts
@@ -203,8 +203,9 @@ export class GitHistoryProvider implements SourceControlHistoryProvider, FileDec
 			return [];
 		}
 
-		// Deduplicate refNames
-		const refNames = Array.from(new Set<string>(options.historyItemRefs));
+		// Deduplicate refNames and truncate them to 10 characters
+		const refNames = Array.from(new Set<string>(options.historyItemRefs))
+			.map(ref => ref.substring(0, 10));
 
 		let logOptions: LogOptions = { refNames, shortStats: true };