How not to pop up this file?

git pull origin master-- allow-unrelated-histories
when the above command runs, a vim editing window pops up with the following text

1 Merge branch "master" of https://github.com/xxxx/mytest
2
3-sharp Please enter a commit message to explain why this merge is necessary,
4-sharp especially if it merges an updated upstream into a topic branch.
5-sharp
6-sharp Lines starting with"-sharp" will be ignored, and an empty message aborts
7-sharp the commit.

excuse me, how can I not let this window pop up?

Mar.21,2021
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