How I can edit commit message with tortoiseGIT? The question is very similar to this but I want to do this with TortoiseGit not with console, is it possible?

If the commit is the head of current branch, that is easy.

1. Context menu -> Git Commit
2. Tick “Amend Last Commit” checkbox
3. Correct your commit message
4. OK

If the commit is the head of other branch, switch to that branch first.

1. Context menu -> TortoiseGit -> Switch/Checkout
2. Choose branch name
3. OK
4. Follow above 1-4 steps to amend commit message

If the commit is in the middle without any merge between head, you need to reset, amend and cherry-pick

1. Context menu -> TortoiseGit -> Log
2. Select the commit -> Context menu -> Reset
3. Hard Reset (this will discard all work contained in commits above the selected commit as well as any un-committed changes in the working directory)
4. OK
5. Follow above 1-4 steps to amend commit message
6. Select from head to one commit above it -> Context menu -> Cherry-pick
7. Continue