Yay can't build locally created PKGBUILD files

[Crandel]

Affected Version

yay v12.5.6 - libalpm v16.0.1

Describe the bug

I have my own PKGBUILD files, copied and refactored from AUR repos. I'm keeping them in my personal github repository, because they are relevant only for one working machine.
I used to build them via makepkg -si command and later via paru -Uic. Recently I found yay -Bi command, which should be an equivalent for them. But it is always failed with command

-> error merging .: fatal: No remote for the current branch.

Looks like yay tries to download it from AUR, but my package do not pushed there.

Reproduction Steps

1. Create new PKGBUILD without pushing to AUR repo
2. yay -Bi

Expected behavior

Package should be build without calling AUR repo, as currently makepkg -si and pary -Uic is working.