git commit --amend出现报错：E325: ATTENTION Found a swap file by the name “.git/.COMMIT_EDITMSG.swp”

E325: ATTENTION
Found a swap file by the name ".git/.COMMIT_EDITMSG.swp"
          owned by: X   dated: Wed Feb 21 12:01:07 2021
         file name: ~X/Sites/mysite/.git/COMMIT_EDITMSG
          modified: no
         user name: X   host name: X-2.local
        process ID: 77109
While opening file ".git/COMMIT_EDITMSG"
             dated: Thu Jan Feb 21 12:01:07 2021
      NEWER than swap file!
 
(1) Another program may be editing the same file.
    If this is the case, be careful not to end up with two
    different instances of the same file when making changes.
    Quit, or continue with caution.
 
(2) An edit session for this file crashed.
    If this is the case, use ":recover" or "vim -r .git/COMMIT_EDITMSG"
    to recover the changes (see ":help recovery").
    If you did this already, delete the swap file ".git/.COMMIT_EDITMSG.swp"
    to avoid this message.
 
Swap file ".git/.COMMIT_EDITMSG.swp" already exists!
[O]pen Read-Only, (E)dit anyway, (R)ecover, (D)elete it, (Q)uit, (A)bort:
           

看到最后的提示了吗，直接切换到大写，然后按 D

或者推出文件在命令行执行

$ rm .git/.COMMIT_EDITMSG.swp