Could one of [Tim Jenness, Adam Thornton] take a look at the open PRs?
The new 'host' repo for repos.yaml, lsst/repos is a clone of lsst/lsstsw with files not related to repos.yaml or the linter/travis removed and the history rewritten to exclude empty commits caused by the deletions. The travis config was updated to run [only] the linter int he new repo.
The other notable change is the deprecation/nooping of lsstsw/bin/rebuild's -u. That flag caused it to redownload a copy of repos.yaml. This functionality has been moved to lsstsw/bin/deploy to be more similar to style to newinstall.sh (it is hoped to either converge deploy & newinstall.sh or at least use newinstall.sh as a lib from deploy). IOW – an end user would rerun deploy to update the local copy of repos.yaml.