Git SSH Urls cannot select a branch

When using envbuilder with a git ssh url we cannot target a specific branch. Tracing this through it's because of the giturls library succeeds in parsing a transport/http regex and gleans the url fragment and this is mapped to a branch in coder. However for ssh no fragment is parsed in the scpProvider regex. Presumably it would be good to have a way similar to https to signal to coder a branch we want to check out. If this can't be done via the Git url then perhaps another env var / parameter needs to be available to achieve this

Commencez par le chemin de parsing de giturls, en particulier la regex de scpProvider, et comparez-le avec le parsing de transport/http ainsi qu’avec la façon dont coder associe les fragments d’URL aux branches. Confirmez comment une URL SSH ou un autre paramètre peut exprimer la branche demandée, puis vérifiez qu’un build envbuilder basé sur SSH effectue son checkout.

Rédigé par le modèle d'indexation à partir du texte de l'issue.