diff --git a/script/static-checks/common.sh b/script/static-checks/common.sh
index d7a56b7..a2793b7 100644
--- a/script/static-checks/common.sh
+++ b/script/static-checks/common.sh
@@ -5,6 +5,6 @@
 #
 
 function get_merge_base() {
-    git fetch origin ${GERRIT_BRANCH#refs/heads/}
+    git fetch --unshallow origin ${GERRIT_BRANCH#refs/heads/}
     git merge-base HEAD FETCH_HEAD | head -1
 }
diff --git a/script/static-checks/static-checks.sh b/script/static-checks/static-checks.sh
index 1424349..5e9edbb 100755
--- a/script/static-checks/static-checks.sh
+++ b/script/static-checks/static-checks.sh
@@ -30,7 +30,7 @@
         fi
     fi
 
-    git fetch --depth=100 origin "$GERRIT_REFSPEC"
+    git fetch --unshallow --update-shallow origin "$GERRIT_REFSPEC"
     git checkout FETCH_HEAD
 
     merge_base=$(get_merge_base)