To clone the Wine development tree using git:

  git clone git://source.winehq.org/git/wine.git

For more information, check the GitWine page.

You can also browse the Wine projects on the WineHQ Gitlab.
List all projects
Project Description Owner Last Change
appdb.git Wine application database Alexandre Julliard 2 years ago
bugzilla.git Bugzilla for the WineHQ site Alexandre Julliard 21 months ago
docs.git Wine documentation Alexandre Julliard 8 years ago
fontforge.git Official FontForge version... Alexandre Julliard 10 years ago
tools.git Tools for the WineHQ site Alexandre Julliard 6 months ago
vkd3d.git D3D12 to Vulkan translation... Alexandre Julliard 83 min ago
website.git WineHQ web site sources Alexandre Julliard 6 months ago
wine.git Wine development tree Alexandre Julliard 92 min ago