Can Git push only first parent history commits?

        The commit history is: 
        origin/master
              Commit1..Commit2..Commit3(T1 branch). 
         
        I want to combined Commit1, Commit2 and Commit3 to one commit_X
and push to origin master and keep old T1 branch history.  So I can't
use rebase.  T1 branch history will be lost after rebase. 
        So I create T2 branch at origin/master:
	
        origin/master
              Commit1..Commit2..Commit3(T1 branch). 
	  T2 (branch).

        Then I use "git merge --no-ff --log T1" merge T1 to T2.  
        So 
	  origin/master
              	+--Commit1..Commit2..Commit3(T1 branch). +

	
+----------------------------------------------------------------+--Comm
itX(T2 branch).

       But when I push T2 to origin master, Commit1 ,2, 3 also pushed.
I expect there are only CommitX at origin master branch. 
       How can I do?
 
best regards
Frank Li

On Sunday 07 December 2008, "Li Frank" [off-list ref] wrote 
about 'Can Git push only first parent history commits?':

       The commit history is:
       origin/master
             Commit1..Commit2..Commit3(T1 branch).

       I want to combined Commit1, Commit2 and Commit3 to one commit_X
and push to origin master and keep old T1 branch history.  So I can't
use rebase.  T1 branch history will be lost after rebase.

I'm pretty sure you want to do something like this:
git branch T2 T1
git rebase -i master T2
# Editor opens
# Edit commit list to squash 3 commits into 1.
git push origin T2:master
git fetch origin

At the end, you'll have a history that looks like:
*--> origin/master (T2)
 \
  -> C1 --> C2 --> C3 (T1)

I'm not sure why you'd want to do this though.  If the commits don't stand 
alone well, they should be squashed on T1 before pushing.  If the commits 
do stand alone well, the history should preserve them on master as well.
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