diff --git a/tools/internal_ci/linux/grpc_e2e_performance_gke.sh b/tools/internal_ci/linux/grpc_e2e_performance_gke.sh
index d9d51aa4832..4f42deb2164 100755
--- a/tools/internal_ci/linux/grpc_e2e_performance_gke.sh
+++ b/tools/internal_ci/linux/grpc_e2e_performance_gke.sh
@@ -50,11 +50,11 @@ GRPC_GITREF="$(git show --format="%H" --no-patch)"
 if [[ "${KOKORO_GITHUB_COMMIT_URL%/*}" == "https://github.com/grpc/grpc/commit" ]]; then
     GRPC_CORE_GITREF="${KOKORO_GIT_COMMIT}"
 else
-    GRPC_CORE_GITREF="$(git ls-remote https://github.com/grpc/grpc.git master | cut -f1)"
+    GRPC_CORE_GITREF="$(git ls-remote -h https://github.com/grpc/grpc.git master | cut -f1)"
 fi
-GRPC_DOTNET_GITREF="$(git ls-remote https://github.com/grpc/grpc-dotnet.git master | cut -f1)"
-GRPC_GO_GITREF="$(git ls-remote https://github.com/grpc/grpc-go.git master | cut -f1)"
-GRPC_JAVA_GITREF="$(git ls-remote https://github.com/grpc/grpc-java.git master | cut -f1)"
+GRPC_DOTNET_GITREF="$(git ls-remote -h https://github.com/grpc/grpc-dotnet.git master | cut -f1)"
+GRPC_GO_GITREF="$(git ls-remote -h https://github.com/grpc/grpc-go.git master | cut -f1)"
+GRPC_JAVA_GITREF="$(git ls-remote -h https://github.com/grpc/grpc-java.git master | cut -f1)"
 # Kokoro jobs run on dedicated pools.
 DRIVER_POOL=drivers-ci
 WORKER_POOL_8CORE=workers-c2-8core-ci
diff --git a/tools/internal_ci/linux/grpc_e2e_performance_gke_experiment.sh b/tools/internal_ci/linux/grpc_e2e_performance_gke_experiment.sh
index 6264e42ee1a..58c7527dcd7 100755
--- a/tools/internal_ci/linux/grpc_e2e_performance_gke_experiment.sh
+++ b/tools/internal_ci/linux/grpc_e2e_performance_gke_experiment.sh
@@ -48,11 +48,11 @@ GRPC_GITREF="$(git show --format="%H" --no-patch)"
 if [[ "${KOKORO_GITHUB_COMMIT_URL%/*}" == "https://github.com/grpc/grpc/commit" ]]; then
     GRPC_CORE_GITREF="${KOKORO_GIT_COMMIT}"
 else
-    GRPC_CORE_GITREF="$(git ls-remote https://github.com/grpc/grpc.git master | cut -f1)"
+    GRPC_CORE_GITREF="$(git ls-remote -h https://github.com/grpc/grpc.git master | cut -f1)"
 fi
-GRPC_DOTNET_GITREF="$(git ls-remote https://github.com/grpc/grpc-dotnet.git master | cut -f1)"
-GRPC_GO_GITREF="$(git ls-remote https://github.com/grpc/grpc-go.git master | cut -f1)"
-GRPC_JAVA_GITREF="$(git ls-remote https://github.com/grpc/grpc-java.git master | cut -f1)"
+GRPC_DOTNET_GITREF="$(git ls-remote -h https://github.com/grpc/grpc-dotnet.git master | cut -f1)"
+GRPC_GO_GITREF="$(git ls-remote -h https://github.com/grpc/grpc-go.git master | cut -f1)"
+GRPC_JAVA_GITREF="$(git ls-remote -h https://github.com/grpc/grpc-java.git master | cut -f1)"
 # Kokoro jobs run on dedicated pools.
 DRIVER_POOL=drivers-ci
 WORKER_POOL_8CORE=workers-c2-8core-ci
diff --git a/tools/internal_ci/linux/grpc_psm_performance_gke_experiment.sh b/tools/internal_ci/linux/grpc_psm_performance_gke_experiment.sh
index e0a183d8bd6..143e923359b 100644
--- a/tools/internal_ci/linux/grpc_psm_performance_gke_experiment.sh
+++ b/tools/internal_ci/linux/grpc_psm_performance_gke_experiment.sh
@@ -47,9 +47,9 @@ GRPC_GITREF="$(git show --format="%H" --no-patch)"
 if [[ "${KOKORO_GITHUB_COMMIT_URL%/*}" == "https://github.com/grpc/grpc/commit" ]]; then
     GRPC_CORE_GITREF="${KOKORO_GIT_COMMIT}"
 else
-    GRPC_CORE_GITREF="$(git ls-remote https://github.com/grpc/grpc.git master | cut -f1)"
+    GRPC_CORE_GITREF="$(git ls-remote -h https://github.com/grpc/grpc.git master | cut -f1)"
 fi
-GRPC_JAVA_GITREF="$(git ls-remote https://github.com/grpc/grpc-java.git master | cut -f1)"
+GRPC_JAVA_GITREF="$(git ls-remote -h https://github.com/grpc/grpc-java.git master | cut -f1)"
 # Kokoro jobs run on dedicated pools.
 DRIVER_POOL=drivers-ci
 WORKER_POOL_8CORE=workers-c2-8core-ci