diff --git a/.taskcluster.yml b/.taskcluster.yml
index 2ea418acc9e..7d7020c5737 100644
--- a/.taskcluster.yml
+++ b/.taskcluster.yml
@@ -43,7 +43,7 @@ tasks:
             - '--login'
             - '-c'
             - >-
-              git clone $GITHUB_EVENT_CLONE_URL repo &&
+              git clone --depth 1 $GITHUB_EVENT_CLONE_URL repo &&
               cd repo &&
               git checkout $GITHUB_EVENT_COMMIT_SHA &&
               python3 decision-task.py
diff --git a/decisionlib.py b/decisionlib.py
index 9e4ef9ab150..4899a6de895 100644
--- a/decisionlib.py
+++ b/decisionlib.py
@@ -122,7 +122,7 @@ class DecisionTask:
             env["GITHUB_EVENT_CLONE_URL"] = clone_url
 
             command = """
-                    git clone $GITHUB_EVENT_CLONE_URL repo
+                    git clone --depth 1 $GITHUB_EVENT_CLONE_URL repo
                     cd repo
                     git checkout $GITHUB_EVENT_COMMIT_SHA
                 """ + command
diff --git a/servo-build-task.sh b/servo-build-task.sh
index 1ef49172c84..747cd7f43be 100755
--- a/servo-build-task.sh
+++ b/servo-build-task.sh
@@ -5,5 +5,5 @@ set -x
 
 git clone https://github.com/servo/servo/
 cd servo
-git checkout 0a2c61da91e77102ae774075ec4126937a79f038
+git checkout --depth 1 0a2c61da91e77102ae774075ec4126937a79f038
 ./mach build -d