how to launch a download UE 5.1 preview-2 via github

how to launch a download UE 5.1 preview-2 via github

the download is started via the command

git clone https://github.com/EpicGames/UnrealEngine.git

version 5.0.3 is being downloaded
is being downloaded how to start downloading version 5.1.0 preview-2 ?

git clone https://github.com/EpicGames/UnrealEngine/tree/5.1.0-preview-2
this command is not accepted, an error is issued:
bash: gh: command not found

I tried to download a zip archive, but the download is canceled when downloading 90%

I started the download through the GitHub Desktop application, I already gave an error 3 times after 5 hours of downloading, after which the download started again