`full` and `compact`. Default value is `full`. See section
OUTPUT in linkgit:git-fetch[1] for detail.
+fetch.negotiationAlgorithm::
+ Control how information about the commits in the local repository is
+ sent when negotiating the contents of the packfile to be sent by the
+ server. Set to "skipping" to use an algorithm that skips commits in an
+ effort to converge faster, but may result in a larger-than-necessary
+ packfile; any other value instructs Git to use the default algorithm
+ that never skips commits (unless the server has acknowledged it or one
+ of its descendants).
+
format.attach::
Enable multipart/mixed attachments as the default for
'format-patch'. The value can also be a double quoted string