As developer I would like to not to have extra value within clone url containing default (bitbucket/) or customized one [ 1 ].

Then my links will look like:

ssh://git@someMirrorHostname.net:7999/someProject/someRepo.git # for primary
ssh://git@secondMirrorHostname.net:7999/someProject/someRepo.git # for mirror

Only difference will be hostname value. It's up to my IT to setup hosts and I can fetch url's from UI which is source of knowledge for me, regarding my links.