Note

Use git log --show-signature and find the oldest commit that hasn't been signed off. Let's say, the oldest not-yet-signed commit's hash is 222fd607.

Go to interactive rebase mode by git rebase -i <HASH>~1, replacing <HASH> with your oldest non-signed commit which is 222fd60 in this example.

git rebase -i 222fd60~1

You'll see list of commits. On the line after each commit you need to sign, add exec git commit --amend --no-edit -s.

For example, I added the command below to 2 commits: 9d7576d and 222fd60.

pick 9d7576d commit message 1
exec git commit --amend --no-edit -s
pick c7b6eea commit message 2
pick e413e83 commit message 3
pick e10b42f commit message 4
pick 222fd60 updated
exec git commit --amend --no-edit -s

Once you added the command, save and exit out the interactive rebase mode with :x. Push changes and you're done!

You may need to force push if you haven't made any changes to the existing codebase.

git push -f origin <BRANCH>

Related to

• How to sign a git commit
• How to batch sign previous commits

References

• https://hyperledger-indy.readthedocs.io/projects/sdk/en/latest/docs/contributors/signing-commits.html#:~:text=If%20you%20need%20to%20re%2Dsign%20a%20bunch%20of%20previous,s'%20%2Di%20HASH%60.