After D10492, we should add a flag to repository reparse to automate reparsing all the incomplete steps from importing commits. Currently, if you end up with some orphaned parse steps, you have to do something like:

$ repository importing --simple | xargs -n1 repository reparse --message --more-flags

...which is cumbersome. Having a single command to automatically reparse all the incomplete steps for each importing commit would make this simpler and allow users to resolve issues satisfactorily in more cases without upstream support.