'full', 'fuller', 'email', 'raw' and 'format:<string>'.
When left out the format default to 'medium'.
+--abbrev-commit::
+ Instead of showing the full 40-byte hexadecimal commit object
+ name, show only handful hexdigits prefix. Non default number of
+ digits can be specified with "--abbrev=<n>" (which also modifies
+ diff output, if it is displayed).
++
+This should make "--pretty=oneline" a whole lot more readable for
+people using 80-column terminals.
+
--encoding[=<encoding>]::
The commit objects record the encoding used for the log message
in their encoding header; this option can be used to tell the