Fetching Missing Objects
------------------------
-- Fetching of objects is done using the existing transport mechanism using
- transport_fetch_refs(), setting a new transport option
- TRANS_OPT_NO_DEPENDENTS to indicate that only the objects themselves are
- desired, not any object that they refer to.
-+
-Because some transports invoke fetch_pack() in the same process, fetch_pack()
-has been updated to not use any object flags when the corresponding argument
-(no_dependents) is set.
+- Fetching of objects is done by invoking a "git fetch" subprocess.
- The local repository sends a request with the hashes of all requested
- objects as "want" lines, and does not perform any packfile negotiation.
+ objects, and does not perform any packfile negotiation.
It then receives a packfile.
-- Because we are reusing the existing fetch-pack mechanism, fetching
+- Because we are reusing the existing fetch mechanism, fetching
currently fetches all objects referred to by the requested objects, even
though they are not necessary.