$ git clone -n https://src.fedoraproject.org/rpms/gtkglextmm.git /var/lib/mock/f31-build-50789-27436/root/chroot_tmpdir/scmroot/gtkglextmm
Cloning into '/var/lib/mock/f31-build-50789-27436/root/chroot_tmpdir/scmroot/gtkglextmm'...
$ git reset --hard ec32c7f9f47cff168aac54b5ef0226a77a0eb6fb
HEAD is now at ec32c7f - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild