$ git clone -n https://src.fedoraproject.org/rpms/HepMC3.git /var/lib/mock/f31-build-90551-32228/root/chroot_tmpdir/scmroot/HepMC3
Cloning into '/var/lib/mock/f31-build-90551-32228/root/chroot_tmpdir/scmroot/HepMC3'...
$ git reset --hard fbbf3cde120b8e13bc4f5d59cc137bc1282a4b91
HEAD is now at fbbf3cd - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild