$ get_sources.sh -b c8s
Retrieving https://git.centos.org/sources/gnome-settings-daemon/c8s/92145a7a5714ebf3aeb90baaacb7e6955335731b
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
curl: (22) The requested URL returned error: 404 Not Found
$ get_sources.sh -b c8
Retrieving https://git.centos.org/sources/gnome-settings-daemon/c8/92145a7a5714ebf3aeb90baaacb7e6955335731b
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 1339k 100 1339k 0 0 947k 0 0:00:01 0:00:01 --:--:-- 948k
...but c8 worked: