Question with git push

If I do a 'git push' to another repository, my changes are reverted the next time that repository is updated, unless I do a hard reset on the remote repository first. Of course, then I would lose my changes in the remote repository. What is the correct way of handling this?

A quick example:

mkdir -p RepositoryA/files RepositoryB cd RepositoryA/files echo "Test file" > test1.txt git init git add . git commit -a -m "Test Commit 1" cd ../../RepositoryB git clone ../RepositoryA/files cd files # I want this change to go to RepositoryA echo "More data" >> test1.txt git add . git commit -a -m "Test Commit 2" git push ../../RepositoryA/files cd ../../RepositoryA/files echo "Test file" > test2.txt git add . # This commit reverts test1.txt to not have "More data" git commit -a -m "Test Commit 3" # This reverts test1.txt to not git diff master^ master

How do I change my commands so I keep the change I made in RepositoryB?

Thanks,