diff --git a/src/ahriman/core/build_tools/sources.py b/src/ahriman/core/build_tools/sources.py
index 49d0b195..0de21adc 100644
--- a/src/ahriman/core/build_tools/sources.py
+++ b/src/ahriman/core/build_tools/sources.py
@@ -82,11 +82,11 @@ class Sources(LazyLogging):
         branch = remote.branch or instance.DEFAULT_BRANCH
         if is_initialized_git:
             instance.logger.info("update HEAD to remote at %s using branch %s", sources_dir, branch)
-            Sources._check_output("git", "fetch", "--quiet", "origin", branch,
+            Sources._check_output("git", "fetch", "--quiet", "--depth", "1", "origin", branch,
                                   cwd=sources_dir, logger=instance.logger)
         elif remote.git_url is not None:
             instance.logger.info("clone remote %s to %s using branch %s", remote.git_url, sources_dir, branch)
-            Sources._check_output("git", "clone", "--quiet", "--branch", branch, "--single-branch",
+            Sources._check_output("git", "clone", "--quiet", "--depth", "1", "--branch", branch, "--single-branch",
                                   remote.git_url, str(sources_dir), cwd=sources_dir.parent, logger=instance.logger)
         else:
             # it will cause an exception later
diff --git a/tests/ahriman/core/build_tools/test_sources.py b/tests/ahriman/core/build_tools/test_sources.py
index 509ee2d5..45f10630 100644
--- a/tests/ahriman/core/build_tools/test_sources.py
+++ b/tests/ahriman/core/build_tools/test_sources.py
@@ -56,7 +56,8 @@ def test_fetch_existing(remote_source: RemoteSource, mocker: MockerFixture) -> N
     local = Path("local")
     Sources.fetch(local, remote_source)
     check_output_mock.assert_has_calls([
-        MockCall("git", "fetch", "--quiet", "origin", remote_source.branch, cwd=local, logger=pytest.helpers.anyvar(int)),
+        MockCall("git", "fetch", "--quiet", "--depth", "1", "origin",
+                 remote_source.branch, cwd=local, logger=pytest.helpers.anyvar(int)),
         MockCall("git", "checkout", "--force", remote_source.branch, cwd=local, logger=pytest.helpers.anyvar(int)),
         MockCall("git", "reset", "--quiet", "--hard", f"origin/{remote_source.branch}",
                  cwd=local, logger=pytest.helpers.anyvar(int)),
@@ -75,7 +76,7 @@ def test_fetch_new(remote_source: RemoteSource, mocker: MockerFixture) -> None:
     local = Path("local")
     Sources.fetch(local, remote_source)
     check_output_mock.assert_has_calls([
-        MockCall("git", "clone", "--quiet", "--branch", remote_source.branch, "--single-branch",
+        MockCall("git", "clone", "--quiet", "--depth", "1", "--branch", remote_source.branch, "--single-branch",
                  remote_source.git_url, str(local), cwd=local.parent, logger=pytest.helpers.anyvar(int)),
         MockCall("git", "checkout", "--force", remote_source.branch, cwd=local, logger=pytest.helpers.anyvar(int)),
         MockCall("git", "reset", "--quiet", "--hard", f"origin/{remote_source.branch}",