clone of clone loses git metadata

Created originally on Bitbucket by jhein (John Hein)

If I clone a git repo using hg-git (thereby converting to an hg repo in the process), then clone from that clone, it seems to me that all the git metadata is lost.

For instance, if the .hg directory after hg clone of a git repo looks something like so:

test-git-hg/.hg:
00changelog.i 
bookmarks 
bookmarks.current 
branch 
cache/
dirstate 
git-mapfile 
git-remote-refs 
git-tags 
git/
hgrc 
requires 
store/
undo.bookmarks 
undo.branch 
undo.desc 
undo.dirstate 

Then the clone of that clone I'm seeing is:

test-git-hg-clone/.hg:
00changelog.i 
bookmarks 
branch 
cache/
dirstate 
hgrc 
requires 
store/