Pushing empty commits to remote
I have pushed one commit to remote but now I realized that the commit message is not correct. I would like to change the commit message but AFAIK it is not possible. So i decided to create empty commit with correct message:
git commit --allow-empty
Are there any disadvantages/consequences of pushing empty commits? Is there any problem I might face in future because of this empty commit??
You won't face any terrible consequence, just the history will look kind of confusing.
You could change the commit message by doing
git commit --amend git push --force-with-lease # (as opposed to --force, it doesn't overwrite others' work)
BUT this will override the remote history with yours, meaning that if anybody pulled that repo in the meanwhile, this person is going to be very mad at you...
Just do it if you are the only person accessing the repo.
Is there any disadvantages/consequences of pushing empty commits?
Aside from the extreme confusion someone might get as to why there's a bunch of commits with no content in them on master, not really.
You can change the commit that you pushed to remote, but the sha1 of the commit (basically it's id number) will change permanently, which alters the source tree -- You'd then have to do a git push -f back to remote.
pushing commits, whether empty or not, causes eventual git hooks to be triggered. This can do either nothing or have world shattering consequences.
As long as you clearly reference the other commit from the empty commit it should be fine. Something like:
Commit message errata for [commit sha1] [new commit message]
As others have pointed out, this is often preferable to force pushing a corrected commit.