git 分支重命名：
如果你在需要重命名的分支上面：
git branch -m new branch name
如果你不在需要重命名的分支上面：
git branch -m old branch name new branch name
Rename the remote branch name
git push origin : old branch name new branch name
Resume link between local branch and remote branch
git push origin -u new branch name
git project commit and branch merge:
stage all changes
git add .
Commit project + description of the commit
git commit -m "commit description"
Push the project to the remote end
git push origin branchname
Project merging (pull the remote branch and merge it into your own branch)
git pull origin remote branch