diff --git a/xds/third_party/envoy/import.sh b/xds/third_party/envoy/import.sh
index c4b5a8516f..b85b066780 100755
--- a/xds/third_party/envoy/import.sh
+++ b/xds/third_party/envoy/import.sh
@@ -13,15 +13,14 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# Update VERSION then in this directory run ./import.sh
+# Update VERSION then execute this script
 
 set -e
-BRANCH=main
 # import VERSION from the google internal copybara_version.txt for Envoy
 VERSION=0478eba2a495027bf6ac8e787c42e2f5b9eb553b
-GIT_REPO="https://github.com/envoyproxy/envoy.git"
-GIT_BASE_DIR=envoy
-SOURCE_PROTO_BASE_DIR=envoy/api
+DOWNLOAD_URL="https://github.com/envoyproxy/envoy/archive/${VERSION}.tar.gz"
+DOWNLOAD_BASE_DIR="envoy-${VERSION}"
+SOURCE_PROTO_BASE_DIR="${DOWNLOAD_BASE_DIR}/api"
 TARGET_PROTO_BASE_DIR=src/main/proto
 # Sorted alphabetically.
 FILES=(
@@ -181,19 +180,13 @@ envoy/type/v3/semantic_version.proto
 
 pushd `git rev-parse --show-toplevel`/xds/third_party/envoy
 
-# clone the envoy github repo in a tmp directory
+# put the repo in a tmp directory
 tmpdir="$(mktemp -d)"
 trap "rm -rf ${tmpdir}" EXIT
+curl -Ls "${DOWNLOAD_URL}" | tar xz -C "${tmpdir}"
 
-pushd "${tmpdir}"
-git clone -b $BRANCH $GIT_REPO
-trap "rm -rf $GIT_BASE_DIR" EXIT
-cd "$GIT_BASE_DIR"
-git checkout $VERSION
-popd
-
-cp -p "${tmpdir}/${GIT_BASE_DIR}/LICENSE" LICENSE
-cp -p "${tmpdir}/${GIT_BASE_DIR}/NOTICE" NOTICE
+cp -p "${tmpdir}/${DOWNLOAD_BASE_DIR}/LICENSE" LICENSE
+cp -p "${tmpdir}/${DOWNLOAD_BASE_DIR}/NOTICE" NOTICE
 
 rm -rf "${TARGET_PROTO_BASE_DIR}"
 mkdir -p "${TARGET_PROTO_BASE_DIR}"
diff --git a/xds/third_party/googleapis/import.sh b/xds/third_party/googleapis/import.sh
index e83536564e..d51893e23d 100755
--- a/xds/third_party/googleapis/import.sh
+++ b/xds/third_party/googleapis/import.sh
@@ -13,14 +13,13 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# Update VERSION then in this directory run ./import.sh
+# Update VERSION then execute this script
 
 set -e
-BRANCH=master
 VERSION=ca1372c6d7bcb199638ebfdb40d2b2660bab7b88
-GIT_REPO="https://github.com/googleapis/googleapis.git"
-GIT_BASE_DIR=googleapis
-SOURCE_PROTO_BASE_DIR=googleapis
+DOWNLOAD_URL="https://github.com/googleapis/googleapis/archive/${VERSION}.tar.gz"
+DOWNLOAD_BASE_DIR="googleapis-${VERSION}"
+SOURCE_PROTO_BASE_DIR="${DOWNLOAD_BASE_DIR}"
 TARGET_PROTO_BASE_DIR=src/main/proto
 # Sorted alphabetically.
 FILES=(
@@ -30,18 +29,12 @@ google/api/expr/v1alpha1/syntax.proto
 
 pushd `git rev-parse --show-toplevel`/xds/third_party/googleapis
 
-# clone the googleapis github repo in a tmp directory
+# put the repo in a tmp directory
 tmpdir="$(mktemp -d)"
 trap "rm -rf ${tmpdir}" EXIT
+curl -Ls "${DOWNLOAD_URL}" | tar xz -C "${tmpdir}"
 
-pushd "${tmpdir}"
-git clone -b $BRANCH $GIT_REPO
-trap "rm -rf $GIT_BASE_DIR" EXIT
-cd "$GIT_BASE_DIR"
-git checkout $VERSION
-popd
-
-cp -p "${tmpdir}/${GIT_BASE_DIR}/LICENSE" LICENSE
+cp -p "${tmpdir}/${DOWNLOAD_BASE_DIR}/LICENSE" LICENSE
 
 rm -rf "${TARGET_PROTO_BASE_DIR}"
 mkdir -p "${TARGET_PROTO_BASE_DIR}"
diff --git a/xds/third_party/protoc-gen-validate/import.sh b/xds/third_party/protoc-gen-validate/import.sh
index 4e30b0e118..64c92b16c2 100755
--- a/xds/third_party/protoc-gen-validate/import.sh
+++ b/xds/third_party/protoc-gen-validate/import.sh
@@ -13,33 +13,31 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# Update GIT_ORIGIN_REV_ID then in this directory run ./import.sh
+# Update VERSION then execute this script
 
 set -e
-BRANCH=main
-# import GIT_ORIGIN_REV_ID from one of the google internal CLs
-GIT_ORIGIN_REV_ID=dfcdc5ea103dda467963fb7079e4df28debcfd28
-GIT_REPO="https://github.com/envoyproxy/protoc-gen-validate.git"
-GIT_BASE_DIR=protoc-gen-validate
-SOURCE_PROTO_BASE_DIR=protoc-gen-validate
+# import VERSION from one of the google internal CLs
+VERSION=dfcdc5ea103dda467963fb7079e4df28debcfd28
+DOWNLOAD_URL="https://github.com/envoyproxy/protoc-gen-validate/archive/${VERSION}.tar.gz"
+DOWNLOAD_BASE_DIR="protoc-gen-validate-${VERSION}"
+SOURCE_PROTO_BASE_DIR="${DOWNLOAD_BASE_DIR}"
 TARGET_PROTO_BASE_DIR=src/main/proto
 # Sorted alphabetically.
 FILES=(
 validate/validate.proto
 )
 
-# clone the protoc-gen-validate github repo in a tmp directory
+pushd `git rev-parse --show-toplevel`/xds/third_party/protoc-gen-validate
+
+# put the repo in a tmp directory
 tmpdir="$(mktemp -d)"
-pushd "${tmpdir}"
-rm -rf "$GIT_BASE_DIR"
-git clone -b $BRANCH $GIT_REPO
-cd "$GIT_BASE_DIR"
-git checkout $GIT_ORIGIN_REV_ID
-popd
+trap "rm -rf ${tmpdir}" EXIT
+curl -Ls "${DOWNLOAD_URL}" | tar xz -C "${tmpdir}"
 
-cp -p "${tmpdir}/${GIT_BASE_DIR}/LICENSE" LICENSE
-cp -p "${tmpdir}/${GIT_BASE_DIR}/NOTICE" NOTICE
+cp -p "${tmpdir}/${DOWNLOAD_BASE_DIR}/LICENSE" LICENSE
+cp -p "${tmpdir}/${DOWNLOAD_BASE_DIR}/NOTICE" NOTICE
 
+rm -rf "${TARGET_PROTO_BASE_DIR}"
 mkdir -p "${TARGET_PROTO_BASE_DIR}"
 pushd "${TARGET_PROTO_BASE_DIR}"
 
@@ -51,4 +49,4 @@ do
 done
 popd
 
-rm -rf "$tmpdir"
+popd
diff --git a/xds/third_party/xds/import.sh b/xds/third_party/xds/import.sh
index f759cb0d35..cda86d0368 100755
--- a/xds/third_party/xds/import.sh
+++ b/xds/third_party/xds/import.sh
@@ -13,15 +13,14 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# Update VERSION then in this directory run ./import.sh
+# Update VERSION then execute this script
 
 set -e
-BRANCH=main
 # import VERSION from one of the google internal CLs
 VERSION=e9ce68804cb4e64cab5a52e3c8baf840d4ff87b7
-GIT_REPO="https://github.com/cncf/xds.git"
-GIT_BASE_DIR=xds
-SOURCE_PROTO_BASE_DIR=xds
+DOWNLOAD_URL="https://github.com/cncf/xds/archive/${VERSION}.tar.gz"
+DOWNLOAD_BASE_DIR="xds-${VERSION}"
+SOURCE_PROTO_BASE_DIR="${DOWNLOAD_BASE_DIR}"
 TARGET_PROTO_BASE_DIR=src/main/proto
 # Sorted alphabetically.
 FILES=(
@@ -54,18 +53,12 @@ xds/type/v3/typed_struct.proto
 
 pushd `git rev-parse --show-toplevel`/xds/third_party/xds
 
-# clone the xds github repo in a tmp directory
+# put the repo in a tmp directory
 tmpdir="$(mktemp -d)"
-trap "rm -rf $tmpdir" EXIT
+trap "rm -rf ${tmpdir}" EXIT
+curl -Ls "${DOWNLOAD_URL}" | tar xz -C "${tmpdir}"
 
-pushd "${tmpdir}"
-git clone -b $BRANCH $GIT_REPO
-trap "rm -rf $GIT_BASE_DIR" EXIT
-cd "$GIT_BASE_DIR"
-git checkout $VERSION
-popd
-
-cp -p "${tmpdir}/${GIT_BASE_DIR}/LICENSE" LICENSE
+cp -p "${tmpdir}/${DOWNLOAD_BASE_DIR}/LICENSE" LICENSE
 
 rm -rf "${TARGET_PROTO_BASE_DIR}"
 mkdir -p "${TARGET_PROTO_BASE_DIR}"