diff --git a/diff-sha.sh b/diff-sha.sh
index 54aa612d..f80c9a0b 100644
--- a/diff-sha.sh
+++ b/diff-sha.sh
@@ -85,7 +85,7 @@ function deepenShallowCloneToFindCommit() {
       exit 1
     fi
 
-    git fetch --no-tags -u --progress --deepen="$depth" origin "$target_branch":"$target_branch"
+    git fetch --no-tags -u --progress --depth="$depth" origin "$target_branch":"$target_branch"
   done
 }