$ git clone -n https://src.fedoraproject.org/rpms/HepMC3.git /var/lib/mock/f42-build-3181719-40950/root/chroot_tmpdir/scmroot/HepMC3
Cloning into '/var/lib/mock/f42-build-3181719-40950/root/chroot_tmpdir/scmroot/HepMC3'...
$ git fetch origin 42e7c9af7734ecf8203a26ec37f7c0d4671fee69:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/HepMC3
 * [new ref]         42e7c9af7734ecf8203a26ec37f7c0d4671fee69 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 42e7c9a Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild