diff --git a/codearchiver/modules/git.py b/codearchiver/modules/git.py
index ca12f9c..578b47e 100644
--- a/codearchiver/modules/git.py
+++ b/codearchiver/modules/git.py
@@ -34,14 +34,14 @@ class Git(codearchiver.core.Module):
 		directory = self._url.rsplit('/', 1)[1]
 		if os.path.exists(directory):
 			logger.fatal(f'{directory!r} already exists')
-			return
+			raise FileExistsError(f'{directory!r} already exists')
 		startTime = datetime.datetime.utcnow()
 		if self._id is None:
 			self._id = f'git_{self._url.replace("/", "_")}_{startTime:%Y%m%dT%H%M%SZ}'
 		bundle = f'{self._id}.bundle'
 		if os.path.exists(bundle):
 			logger.fatal(f'{bundle!r} already exists')
-			return
+			raise FileExistsError(f'{bundle!r} already exists')
 
 		logger.info(f'Cloning {self._url} into {directory}')
 		codearchiver.subprocess.run_with_log(['git', 'clone', '--verbose', '--mirror', self._url, directory])