Add providing location for fetch

extends aboutcode-org#54

Signed-off-by: Mateusz Perc <m.perc@samsung.com>

src/fetchcode/__init__.py

@@ -88,13 +88,16 @@ def fetch_ftp(url, location):
     return resp
 
 
-def fetch(url):
+def fetch(url, location=None):
     """
     Return a `Response` object built from fetching the content at the `url` URL string and store content at a temporary file.
+    Saving the content in a file at `location`.
+    If location is None, save the file in a newly created temporary directory.
     """
 
-    temp = tempfile.NamedTemporaryFile(delete=False)
-    location = temp.name
+    if location is None:
+        temp = tempfile.NamedTemporaryFile(delete=False)
+        location = temp.name
 
     url_parts = urlparse(url)
     scheme = url_parts.scheme