I noticed when you write a git link like firstname.lastname@example.org:EpicGames/UnrealEngine.git, the forum will auto convert it to a mail url. It shouldn’t do that for git links.
Because you missing protocol identifier so by default vbulletin thinks it’s email, i suspect that SSH (but not sure port should be in after “:”)? so it should be ssh://email@example.com:EpicGames/UnrealEngine.git or use HTTP link https://github.com/EpicGames/UnrealEngine.git it should work with git clients too
Learn little about URI ;] http://en.wikipedia.org/wiki/URI_scheme
Oh well thats really true. I missed/ignored the fact this is user@server and missing the protocol specifier is just a shortcut.