diff --git a/setup.cfg b/setup.cfg
index 7055c0a..b43347d 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -47,6 +47,10 @@ install_requires =
 console_scripts =
     weasel = weasel.cli:app
 
+[tool:pytest]
+markers =
+    issue: references specific issue
+
 [mypy]
 ignore_missing_imports = True
 no_implicit_optional = True
diff --git a/weasel/tests/cli/test_cli.py b/weasel/tests/cli/test_cli.py
index 9e89534..79e1c81 100644
--- a/weasel/tests/cli/test_cli.py
+++ b/weasel/tests/cli/test_cli.py
@@ -6,7 +6,7 @@
 
 from weasel.cli.remote_storage import RemoteStorage
 from weasel.schemas import ProjectConfigSchema, validate
-from weasel.util import is_subpath_of, load_project_config, make_tempdir
+from weasel.util import git_checkout, is_subpath_of, load_project_config, make_tempdir
 from weasel.util import validate_project_commands
 
 
@@ -165,3 +165,28 @@ def test_local_remote_storage_pull_missing():
         remote = RemoteStorage(d / "root", str(d / "remote"))
         assert remote.pull(filename, command_hash="aaaa") is None
         assert remote.pull(filename) is None
+
+
+def test_project_git_dir_asset():
+    with make_tempdir() as d:
+        # Use a very small repo.
+        git_checkout(
+            "https://github.com/explosion/os-signpost.git",
+            "os_signpost",
+            d / "signpost",
+            branch="v0.0.3",
+        )
+        assert os.path.isdir(d / "signpost")
+
+
+@pytest.mark.issue(66)
+def test_project_git_file_asset():
+    with make_tempdir() as d:
+        # Use a very small repo.
+        git_checkout(
+            "https://github.com/explosion/os-signpost.git",
+            "README.md",
+            d / "readme.md",
+            branch="v0.0.3",
+        )
+        assert os.path.isfile(d / "readme.md")
diff --git a/weasel/util/git.py b/weasel/util/git.py
index d0a6ec3..401d73a 100644
--- a/weasel/util/git.py
+++ b/weasel/util/git.py
@@ -1,3 +1,4 @@
+import os
 import shutil
 from pathlib import Path
 from typing import Tuple
@@ -41,7 +42,10 @@ def git_checkout(
             if not is_subpath_of(tmp_dir, source_path):
                 err = f"'{subpath}' is a path outside of the cloned repository."
                 msg.fail(err, repo, exits=1)
-            shutil.copytree(str(source_path), str(dest))
+            if os.path.isdir(source_path):
+                shutil.copytree(source_path, dest)
+            else:
+                shutil.copyfile(source_path, dest)
         except FileNotFoundError:
             err = f"Can't clone {subpath}. Make sure the directory exists in the repo (branch '{branch}')"
             msg.fail(err, repo, exits=1)