where '<format>' can be one of 'oneline', 'short', 'medium',
'full', 'fuller', 'email', 'raw' and 'format:<string>'.
When omitted, the format defaults to 'medium'.
++
+Note: you can specify the default pretty format in the repository
+configuration (see linkgit:git-config[1]).
--abbrev-commit::
Instead of showing the full 40-byte hexadecimal commit object