git rebase -i commitId

假设想要合并最后3个commit， git log显示

commit id 1

commit id 2

commit id 3

commit id 4

则执行git rebase -i commitId4. 注意是4，不是3.

然后，pick最老的commit (commit id 3).

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https://blog.csdn.net/qiaoqiaoBigBoss/article/details/113729079