There are two places he talks about going to the Capitol.
The passage near the beginning:
Now, it is up to Congress to confront this egregious assault on our democracy. And after this, we're going to walk down, and I'll be there with you, we're going to walk down, we're going to walk down.
Anyone you want, but I think right here, we're going to walk down to the Capitol, and we're going to cheer on our brave senators and congressmen and women, and we're probably not going to be cheering so much for some of them.
Because you'll never take back our country with weakness. You have to show strength and you have to be strong. We have come to demand that Congress do the right thing and only count the electors who have been lawfully slated, lawfully slated.
I know that everyone here will soon be marching over to the Capitol building to peacefully and patriotically make your voices heard.
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The passage right at the end:
I think one of our great achievements will be election security. Because nobody until I came along had any idea how corrupt our elections were.
And again, most people would stand there at 9 o'clock in the evening and say I want to thank you very much, and they go off to some other life. But I said something's wrong here, something is really wrong, can have happened.
And we fight. We fight like hell. And if you don't fight like hell, you're not going to have a country anymore.
Our exciting adventures and boldest endeavors have not yet begun. My fellow Americans, for our movement, for our children, and for our beloved country.
And I say this despite all that's happened. The best is yet to come.
So we're going to, we're going to walk down Pennsylvania Avenue. I love Pennsylvania Avenue. And we're going to the Capitol, and we're going to try and give.
The Democrats are hopeless — they never vote for anything. Not even one vote. But we're going to try and give our Republicans, the weak ones because the strong ones don't need any of our help. We're going to try and give them the kind of pride and boldness that they need to take back our country.
So let's walk down Pennsylvania Avenue.
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The Panorama edit, as reported in the Prescott memo:
“We’re gonna walk down to the Capitol and I’ll be with you and we fight. We fight like hell and if you don’t fight like hell, you’re not gonna have a country anymore.”
It takes a little more splicing to create this exact quote but the phrase 'I'll be [there] with you' is only found in the first passage.
In the second passage, he says "walk down Pennsylvania Avenue" and "we're going to the Capitol" but not "we're going to walk down to the Capitol". That phrase is also only found in the first passage.
So the first part of the Panorama splice, “We’re gonna walk down to the Capitol and I’ll be with you ..." is from the first passage, near the start of the speech, and the second, 'fight like hell' part is from right near the end.
I still don't understand what difference you think it makes.
In the second passage, 'fight like hell' appears to relate to the preceding paragraphs about election security (note the word 'And ...'). As discussed earlier, he uses the word 'fight' many times in the speech and most times it's clear he means a political fight or an argument.
'Going to the Capitol' comes after 'fight like hell' in the second passage and seems to be part of the summing up.
It doesn't matter which particular mention of going to the Capitol you pick. The splice implied Trump said they were going to the Capitol to fight like hell and he didn't say that.
I am now bored shitless with Trump's speech and will not be trawling through it again.