Fix some minor issues with the release script

.make-release.sh

@@ -225,12 +225,12 @@ infof "Commit changes ($package_dir)"
 infof "Create new tag"
 git tag -a v${release_version} -m "repoctl version ${release_version} release"
 echo "Unpushed commits:\n"
-git log --oneline --color=always $main_branch..origin/$main_branch | sed -r 's/^/\t/'
+git log --oneline --color=always origin/$main_branch..$main_branch | sed -r 's/^/\t/'
 echo
-confirm "Push $main_branch branch?"
+confirm "Push $main_branch branch?" || exit 2
 git push
-confirm "Push v${release_version} tag?"
-git push v${release_version}
+confirm "Push v${release_version} tag?" || exit 2
+git push origin v${release_version}
 
 # Step 8:
 infof "Create new Github release"