If you want to fix a commit inside a [[PR]] you can use [[Git]] rebasing and the easiest way to do it is using an interactive rebase. Let's say you have three commits:

Commit A (sha: 123)

Commit B (sha: 456)

Commit C (sha: 789)

Now you want to change Commit B. Start by finding its [[SHA]] ID using git log, in this example we've called it 456.

Run git rebase -i 456^ to start an interactive rebase. Note the ^ at the end which includes the commit in question in the rebase

You'll be presented with a [[Vim]] buffer that would look something like:

pick 456 Commit B
pick 789 Commit C
	  
# Commands
# p, pick <commit> = use commit
# e, edit <commit> = use commit, but stop for amending
# ...

Notice the edit command, which is exactly what we want. Alter the line for Commit B with the edit command instead of the pick command.

edit 456 Commit B
pick 789 Commit C

After saving, [[How to save and quit Vim]], you'll be taken back in time to Commit B where you can make the changes you set out to do.

Once your done with the changes, run git rebase --continue to take you back to the present.

If you would run git log at this point you would notice that the commit SHAs for Commit B and Commit C have changed. This happened be we altered history using with our rebase. To update our PR we need to do a force push, git push -f

[[Johnny Ji]]. ([[2021-06-08]]). Engineering Culture: Keeping a Clean Commit History. Link