Synchronization

git fetch <remote-host-name> <remote-branch-name> Update remote code to local repository, no automatic merge, later you can compare the difference between local and online branches
git merge <remote-host-name>/<remote-branch-name> Merge the remote code into the local repository

``git pull :` pulls the remote branch updates to the local repository and automatically merges

#git pull = git fetch + git merge
#It is not recommended to use git pull directly, instead the following command is recommended
git fetch origin master
#compare changes, then merge
git diff HEAD FETCH_HEAD
git merge origin/master

git pull <remote-host-name> --tags pull remote tags
git remote -v show all remote repositories
git remote show <remote-host-name> <remote-branch-name> Show information about a remote repository
git remote add <remote-host-name> <git-url> Add a new remote repository and name it
git push <remote-host-name> <remote-branch-name> Push the local branch to a remote branch that it tracks (usually both have the same name), or create a new remote branch if it doesn’t exist
git push <remote-host-name> : refs/for/<remote-branch-name> Delete the specified remote branch1
git push <remote-host-name> --delete <remote-branch-name> Delete the specified remote branch 2
git push <remote-host-name> If the current branch has a tracking relationship with the remote branch, both the local and remote branches can be omitted and the current branch pushed to the corresponding branch on the origin host
git push If the current branch has only one remote branch, then both host names can be omitted
git push -u <remote-host-name> <remote-branch-name> If the current branch has a tracking relationship with multiple hosts, you can specify a default host with the -u argument, so that you can use git push without any arguments later
git push --all <remote-host-name> pushes all local branches to the remote host, regardless of whether there is a corresponding remote branch
git push --force <remote-host-name> force the push to the remote host
git push <remote-host-name> --tags Push tags