My question is:
I have a repository called "site-layout" with only the branch master, where I develop a layout with the bootstrap v4.
I still own another repository called "site-old" also only with the branch master, where is the code of another layout but created with the bootstrap v3.
What I would like to do is to "import" (I do not know if that would be the correct term) this "site-old" into the "site-layout" as a new branch that I want to call "bootstrapv3" ( and then delete the "site-old", and then, if possible, "mirror" this branch in the site-layout master.
EDIT: If it gets too complicated (even better), it could just be "mirror" the content of the "old site" directly in the site-layout master, as long as it does not interfere with the fork I've already created based in the contents of the current master.
Finally, to illustrate, the structure of both repositories looks like this:
site-layout (ou site-old)
|
+--- master
And how I would like to organize:
site-layout
|
+---master ("transferir" o conteúdo daqui pra bootstrapv4, e depois passar pra cá o conteúdo da bootstrapv3 (ou site-old))
+--- bootstrapv3 (com o conteudo vindo da antiga site-old)
+--- bootstrapv4 (com o conteúdo vindo da master do site-layout)
Thank you in advance!