RZ/G2L板级支持包1.4版本

URI: git://git.yoctoproject.org/poky
layers: meta, meta-poky, meta-yocto-bsp
branch: dunfell
revision: 795339092f87672e4f68e4d3bc4cfd0e252d1831
(tag: dunfell-23.0.13)

URI: git://git.openembedded.org/meta-openembedded
layers: meta-oe, meta-python, meta-multimedia
branch: dunfell
revision: ab9fca485e13f6f2f9761e1d2810f87c2e4f060a

URI:git.yoctoproject.org/.../
layers: meta-gplv2
branch: dunfell
revision: 60b251c25ba87e946a0ca4cdc8d17b1cb09292ac

(Optional) 
URI:git.yoctoproject.org/.../meta-virtualization
layers: meta-virtualization
branch: dunfell
commitID: 9e9868ef3d6e5da7f0ecd0680fcd69324593842b

这些URI对应的链接在编译过程中会自动查找下载吗？为什么不在GitHub里面将这些内容放入同一分支（标签）