There is some cases where the URL does not contain the filename, therefore the auto-generated name is not suitable.
For example, downloading artifacts from Gitlab API is done using the following URL
https://<gitlab-on-premise-url>/api/<version>/projects/<project_id>/jobs/artifacts/<branch>/download?job=<job-name>
Therefore the downloaded file will have the name download?job=<job-name>.
Having a new variable like ansistrano_download_dest to manually set the destination file name would be awesome!