Fix error with bundle install not fetching git repos when necessary

when given a commit hash, git-rev-parse does not actually check if it exists in
the repo. Use git cat-file instead
2 jobs for fix-bundle-install-new-git-commit in 7 minutes and 18 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Build
passed #1466
build-glibc

00:04:09

passed #1467
build-musl

00:03:08