- Adds `git merge(M|P)R <source_branch> <target_branch> [--delete-after-merge]` command
to simulate a Merge/Pull Request being merged into the target branch
- The optional flag `--delete-after-merge` will remove the merged branch on the origin tree
- The local remote branch remains as it is Git default behavior, even after `git fetch`
(it would require `git fetch --prune` support to automatically prune remote tracking branches)
- You can push a branch with a deleted remote tracking branch on origin, the ref will just update.
Resolves#1057