[Fedora-packaging] rpmbuild: question and help about tarball download

[zosrothko]

Hello

I am using a Git URL for specifying the source tarbal of the poco
package as below
Source0:          
https://github.com/pocoproject/%{name}/archive/%{gittag0}.tar.gz#/%{name}...

1/ no file found rpmbuild/SOURCES/
The command below

/usr/bin/rpmbuild -bs --target noarch --nodeps poco.spec

 fails because it does find the rpmbuild/SOURCES/poco-1.7.3.tar.gz

so I am wondering why rpmbuild does not or cannot download the
poco-1.7.3.tar.gz itself?


2/ Help on the sources file  
Where can I found the documentation for specifying a GitHub path for the
sources file?

TFAH

zos