Adding back a file in git which was renamed to a different file name

Question

I had a file:

a.cs

which I renamed to:

b.cs

and made some logic changes in b.cs

Now I realized I need to re-add a.cs BUT keep b.cs.

I added back a.cs but I don't see it in the working directory and so I can't add it to the staging area and commit.

In the remote, I see that b.cs was renamed.

I assume it's because I renamed the original file instead of deleting it.

I know about the mv command but I don't know how to use it in this specific scenario

So what I need now, if it's possible, is to add back a.cs AND still keep b.cs?

Updated Ok - so this is mistake. The file was added back. Sorry for the confusion.

Answer 1

git restore -s <SHA1> -- a.cs

Assuming that a.cs was committed earlier and it's SHA1 can be found in git log.

This will restore the file a.cs to the current working branch.

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This is how SHA1 hashes look like a94a8fe5ccb19ba61c4c0873d391e987982fbbd3.