Rename/Edit/Squash commit(s)

If you want to git push --force on main, you may disable force protection on this branch in repo settings -> branches (e.g: https://gitlab.com/USER/REPO/-/settings/repository/branch_rules?branch=main)

Renaming the latest commit

git commit --amend -m "New commit message"
git push --force origin example-branch

Renaming any commit

For example: renaming HEAD~2 commit (HEAD is latest commit)

git rebase -i HEAD~2  # Replace 2 with the number of commits you want to go back

It will open text editor, You'll see something like this:

find the correct pick <commit hash> message and replace 'pick' to 'reword'

save and exit

git push -f origin example-branch

(Squash) Replacing x last commits with 1 new single commit

via VSCode

1. Install Gitlens extension for VSCode: https://marketplace.visualstudio.com/items?itemName=eamodio.gitlens

2. Press F1 and type

   >GitLens: Git Rebase

   then for example, type #<first-commit-hash>

3. It should open interactive rebase editor like this where you can squash commits:

1. When you're done, press "START REBASE" and close the git message files that it will open one by one

Manual