The old glibc-sync-upstream.sh did commits in case of success. With the new tool, it is actually possible to recover from failed rebases, using regular Git commands. I expect that the developer will do that, then run glibc-git-to-patches to apply the changes to the RPM packaging, and then commit the whole thing. But at this point, there is currently no way to produce an appropriate commit message template, in the same way the old tool did.

I think the answer to that is to have something that looks at the %changelog entries added since the last commit, and calls git commit --edit with a reasonable default, rather than trying to call git commit from glibc-sync-upstream.