git-svn: both merged commits and original commits are showing up in branches after migration

I've done a migration using "git-svn init" and "git-svn fetch". After
the migration, I did a "git log refs/remotes/svn/6.7" and found that
it listed both the commits that I merged into the 6.7 branch and the
original commits to the trunk/master even though the SVN history
obviously only has what was merged into that branch. Any idea why the
Git branch has both (see below)? I did notice that the merged commits
seem to have extra metadata in the "Merge" property.

Results of "git log /path/to/6.7":

commit 6e18557b8f7e7173d26df7dd1857362c27eb3ab1
Merge: e36cfba c8a400c
Author: <author>
Date:   Fri Jun 25 21:00:19 2010 +0000

    PROJ-6648 (Merged from Trunk): Updated the API version in build file

    git-svn-id:
file:///Users/Developers/git_transition/svn_repo/6.7@14254
f4356f54-06d4-464e-91d3-36485834cb4b

commit c8a400c3ef8ac113dd325382bedd073bfedc3dd1
Author: <author>
Date:   Fri Jun 25 20:39:33 2010 +0000

    PROJ-6648: Updated the API version in build file

    git-svn-id:
file:///Users/Developers/git_transition/svn_repo/trunk@14253
f4356f54-06d4-464e-91d3-36485834cb4b


commit 9b968ba82f6f850919c41702dc024703e5721b7e
Merge: <author2>
Author: Mike Strauch [off-list ref]
Date:   Fri Jun 25 14:45:30 2010 +0000

    PROJ-6819: (Merged from Trunk) Reverted changes from last commit
where initialize and teardown were called on each sftpshuttle
invocation.  Now using a strategy where

    git-svn-id:
file:///Users/Developers/git_transition/svn_repo/6.7@14251
f4356f54-06d4-464e-91d3-36485834cb4b


commit c628db12ef8136cdf22749058e8d8682d0021b8b
Author: <author2>
Date:   Thu Jun 24 20:10:53 2010 +0000

    PROJ-6819: Reverted changes from last commit where initialize and
teardown were called on each sftpshuttle invocation.  Now using a
strategy where the retries counter

    git-svn-id:
file:///Users/Developers/git_transition/svn_repo/trunk@14240
f4356f54-06d4-464e-91d3-36485834cb4b