git svn and SVN property svn:original-date

When doing "git svn dcommit", the SVN revision just has the date/time stamp of the time of the dcommit.

Apparently SVN revisions can have an "svn:original-date" property, which would be good to set on dcommit, to preserve the timestamp from the git repository.

https://subversion.apache.org/docs/api/1.7/group__svn__props__revision__props.html#ga8f17351dd056149da9cb490f1daf4018
"The svn:date property must be monotonically increasing, along with the revision number. In certain scenarios, this may pose a problem when the revision represents a commit that occurred at a time which does not fit within the sequencing required for svn:date. This can happen, for instance, when the revision represents a commit to a foreign version control system, or possibly when two Subversion repositories are combined. This property [svn:original-date] can be used to record the TRUE, original date of the commit."

-- 
Craig McQueen