ignore .git folder in output dir

PyTeX/build/build/builder.py

@@ -64,15 +64,19 @@ class PyTeXBuilder:
         return version
 
     def _ignored_subfolders_in_build_dir(self) -> List[Path]:
+        paths = []
         if self._build_target_type == PyTeXRootDirType.BUILD:
             dirs = [
                 self.pytex_config.build_dir_specification.tex_source_root,
                 self.pytex_config.build_dir_specification.doc_root
             ]
-            return [
+            paths =  [
                 path.absolute().resolve() for path in dirs
             ]
-        return []
+        paths.append(
+                (self.target_root / '.git').absolute().resolve()
+        )
+        return paths
 
     def is_ignored_in_build_dir(self, path: RelativePath) -> bool:
         real_path: Path = path.absolute().resolve()