$ git clone -n https://src.fedoraproject.org/rpms/gtk+extra.git /var/lib/mock/f31-build-85727-31620/root/chroot_tmpdir/scmroot/gtk+extra
Cloning into '/var/lib/mock/f31-build-85727-31620/root/chroot_tmpdir/scmroot/gtk+extra'...
$ git reset --hard 906f5913195dcccb5ff34683c589399104c499da
HEAD is now at 906f591 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild