Otherwise the new check we added there to verify that upgrading without
`--allow-downgrade` fails itself fails.
See: https://github.com/ostreedev/ostree/pull/2099#issuecomment-
629805840
# Test upgrade with and without --override-commit
# See https://github.com/GNOME/ostree/pull/147
+sleep 1
+os_repository_new_commit
${CMD_PREFIX} ostree pull --repo=sysroot/ostree/repo --commit-metadata-only --depth=-1 testos:testos/buildmaster/x86_64-runtime
head_rev=$(${CMD_PREFIX} ostree rev-parse --repo=sysroot/ostree/repo testos/buildmaster/x86_64-runtime)
prev_rev=$(${CMD_PREFIX} ostree rev-parse --repo=sysroot/ostree/repo testos/buildmaster/x86_64-runtime^^^^)