How can I move a tag on a git branch to a different commit?

I created a tag on the master branch called v0.1 like this:

git tag -a v0.1

But then I realized there were still some changes I needed to merge into master for release 0.1, so I did that. But now my v0.1 tag is stuck on (to invoke the post-it note analogy) the wrong commit. I want it to be stuck on the most recent commit on master, but instead it is stuck on the second most recent commit on master.

How can I move it to the most recent commit on master?

Solution

Use the -f option to git tag:

-f
--force

    Replace an existing tag with the given name (instead of failing)

You probably want to use -f in conjunction with -a to force-create an annotated tag instead of a non-annotated one.

Example

Delete the tag on any remote before you push
```
git push origin :refs/tags/<tagname>
```
Replace the tag to reference the most recent commit
```
git tag -fa <tagname>
```
Push the tag to the remote origin
```
git push origin --tags
```