github - git改变地址后连不上（已解决）

在eclipse里改了git的地址，同步时出现让填密码的框，不知道是不是密码不对，没连上。然后每次要同步都会出现这个提示：
“Fetch operation failed
Synchronization will be continued based on data that are currently in repository.
You can disable fetching changes before synchronization in preferences: Team > Git > Always launch fetch before synchronization”
应该怎么办？