Gitea set-up
You will need a username and password for the TRE hosted Gitea instance. Now go to https://gitea-uclhtreprod.azurewebsites.net/ from a browser in the TRE.
Log on
You’ll also want to run
git config --global user.name
git config --global user.email
with your Github identity, so that you’re commits are written with your real github handle
And to save you having to re-enter your username and password on every interaction with Gitea then
git config --global credential.helper store
via SO