diff --git a/source/snag/core/core.d b/source/snag/core/core.d
index e528ab1..b114dd7 100644
--- a/source/snag/core/core.d
+++ b/source/snag/core/core.d
@@ -45,6 +45,12 @@ class Snag {
 	}
 
 	void initialize() {
+		auto result = execute(_baseCommand ~ ["rev-parse", "--git-dir"]);
+		!result.status &&
+			throw new SnagException(
+				"The Git repository has already been initialized: "
+				~ result.output.strip('\n')
+			);
 		git(
 			["init"],
 			"A Git repository initialization error occurred"