You just need to push an 'empty' reference to the remote tag name:
(您只需要将“空”引用推送到远程标记名称：)
git push origin :tagname
Or, more expressively, use the --delete option (or -d if your git version is older than 1.8.0):
(或者，更--delete ，使用--delete选项（如果您的git版本早于1.8.0，则使用-d ）：)
git push --delete origin tagname
Note that git has tag namespace and branch namespace so you may use the same name for a branch and for a tag.
(请注意，git具有标记命名空间和分支命名空间，因此您可以对分支和标记使用相同的名称。)
If you want to make sure that you cannot accidentally remove the branch instead of the tag, you can specify full ref which will never delete a branch: (如果要确保不会意外删除分支而不是标记，则可以指定永不删除分支的完整引用：)
git push origin :refs/tags/tagname
If you also need to delete the local tag, use:
(如果您还需要删除本地标记，请使用：)
git tag --delete tagname
Background (背景)
Pushing a branch, tag, or other ref to a remote repository involves specifying "which repo, what source, what destination?"
(将分支，标记或其他引用推送到远程存储库涉及指定“哪个存储库，哪个源，哪个目标？”)
git push remote-repo source-ref:destination-ref
A real world example where you push your master branch to the origin's master branch is:
(将主分支推送到原始主分支的真实示例是：)
git push origin refs/heads/master:refs/heads/master
Which because of default paths, can be shortened to:
(由于默认路径，可以缩短为：)
git push origin master:master
Tags work the same way:
(标签的工作方式相同：)
git push origin refs/tags/release-1.0:refs/tags/release-1.0
Which can also be shortened to:
(这也可以缩短为：)
git push origin release-1.0:release-1.0
By omitting the source ref (the part before the colon), you push 'nothing' to the destination, deleting the ref on the remote end.
(通过省略源ref（冒号前的部分），将'nothing'推送到目标，删除远端的ref。)
