Fixing Up a Commit

You have two commits on feature-auth and realize that c2 (“add password validation”) should really be part of d0 (“add login form”) — they’re logically the same change.

│╭─ fa [feature-auth]
│●   c2 add password validation
│●   d0 add login form
├╯
│
● a1b2c3d (upstream) [origin/main] Latest upstream commit

Fold the newer commit into the older one:

$ git loom fold c2 d0

Commit c2 disappears from history and its changes are absorbed into d0:

│╭─ fa [feature-auth]
│●   d0 add login form
├╯
│
● a1b2c3d (upstream) [origin/main] Latest upstream commit

The source commit must be newer than the target. The target keeps its message.

See also: fold reference