I have three items of feedback:
some developers may be using git with gnome-keyring, however, git does not ship with git-credential-gnome-keyring, it would be nice to have as a package that can be installed separately.
building git/contrib/credential/gnome-keyring requires libgnome-keyring.so but it does not exist in /usr/lib64 (the linker looks for libgnome-keyring.so) therefore one needs to manually ln -s libgnome-keyring.so.0 to libgnome-keyring.so
pkg-config for gnome-keyring does not exist. It would be nice to have.