git rebase -i HEAD~4
pick e459d80 Do xyz
pick 0459045 Do something
pick 90fdeab Do something else
pick facecaf Do abc
#Now replace pick with reword for the commits
# you want to edit the messages of
pick e459d80 Do xyz
reword 0459045 Do something
reword 90fdeab Do something else
pick facecaf Do abc
# Exit the editor after saving the file,
# and next you will be prompted to edit the messages
# for the commits you had marked reword, in one file per message.
#Source https://stackoverflow.com/a/45302710/11266661