Graph log - follow history across copies and renames

[Stanimir Stamenkov]

I have a file renamed/moved at some point and I issue:

hg glog my_file

The log normally stops at the revision the file was renamed/moved. 
As far as I've observed the glog command doesn't have a --follow 
option as the normal log command has.  Is there a technical 
limitation the glog command doesn't have a --follow option, or it is 
just not implemented?

-- 
Stanimir