How to change the SHA-1 of a specific commit in place with git?

Question

The target commit may have parents and descendants.

it needs to replace the old commit in place,

so it\'s not as simple as cherry c

Answer 1

Okay, let's see if this helps.

WARNING:

• This break (some) pull / push / fetch.
• Not all git command support this.
• It does not share with other users.
• This does not change the commit, it replace it.

Are you sure you want to do this? Scroll down if yes.

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This is called graft point. You create a file .git/info/grafts and have the following info:

Let's say you have this:

/---D
A---B---C

Now you want to replace B with D (without changing the commit id), you put this in graft:

It keeps the old commitid, with the limitation stated above.