$ git clone -n https://src.fedoraproject.org/rpms/rubygem-gtk3.git /var/lib/mock/f31-build-98136-33031/root/chroot_tmpdir/scmroot/rubygem-gtk3
Cloning into '/var/lib/mock/f31-build-98136-33031/root/chroot_tmpdir/scmroot/rubygem-gtk3'...
$ git reset --hard 0442cbcbfd6c9fee13d7cc254fb4ec293dbb8663
HEAD is now at 0442cbc - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild