Given a Go source file with a comment at the top of the file (not a package comment):

// Copyright 2022 ...

package main

import (
	"cmd/internal/edit"
)

func main() {
	_ = edit.Buffer
}

and a patch to modify the imports:

@@
var randomIdentifier identifier
@@
-import "cmd/internal/edit"
+import "github.com/foo/bar/internal/edit"

edit.randomIdentifier

the comment at the top is removed by gopatch, resulting with the following file:

package main

import "github.com/foo/bar/internal/edit"

func main() {
	_ = edit.Buffer
}