try this steps (from yesterday's slide):
Exercise – Lets Synch your FORK with SimCenter
1. Open terminal window/ Powershell
2. cd to SimCenterBootcamp2020 folder
3. Lets add and commit any changes (or checkout original) .. Type: git status
git add .
git commit –m “my great changes”
4. Lets look at remotes repos
git remote -v
5. Add NHERI-SimCenter/SimCenterBootcamp-2020 as upstream
git remote add upstream
https://github.com/NHERI-SimCenter/SimCenterBootcamp2020.git6. Look at remotes again
git remote -v
7. Lets fetch upstream
git fetch upstream
8. Use checkout to get last committed version
git merge upstream/master
9. Git add, commit and push to our own remote repo (origin)
git add .
git commit –m “fmk – updated code from merge”
git push origin master
10. Go to your browser, your remote repo (origin) should contain latest code