$ git clone -n https://src.fedoraproject.org/rpms/rubygem-glib2.git /var/lib/mock/f31-build-86749-31704/root/chroot_tmpdir/scmroot/rubygem-glib2
Cloning into '/var/lib/mock/f31-build-86749-31704/root/chroot_tmpdir/scmroot/rubygem-glib2'...
$ git reset --hard 4ac5fed4e3065f897c4bc2ad11482e40beb19da9
HEAD is now at 4ac5fed - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild