diff --git a/src/main/kotlin/com/jakewharton/gitout/Engine.kt b/src/main/kotlin/com/jakewharton/gitout/Engine.kt
index 2cdb3df..a8d4e1a 100644
--- a/src/main/kotlin/com/jakewharton/gitout/Engine.kt
+++ b/src/main/kotlin/com/jakewharton/gitout/Engine.kt
@@ -162,6 +162,7 @@ internal class Engine(
 			command.apply {
 				add("clone")
 				add("--mirror")
+				add("--")
 				add(url)
 				add(repo.name)
 			}