$ git clone -n https://src.fedoraproject.org/rpms/HepMC.git /var/lib/mock/f40-build-792856-138672/root/chroot_tmpdir/scmroot/HepMC
Cloning into '/var/lib/mock/f40-build-792856-138672/root/chroot_tmpdir/scmroot/HepMC'...
$ git fetch origin 21231489fe13115b44befd9da19aa6c462716d4a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/HepMC
 * [new ref]         21231489fe13115b44befd9da19aa6c462716d4a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2123148 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild