$ git clone -n https://src.fedoraproject.org/rpms/rust-helvum.git /var/lib/mock/f40-build-2325360-58807/root/chroot_tmpdir/scmroot/rust-helvum
Cloning into '/var/lib/mock/f40-build-2325360-58807/root/chroot_tmpdir/scmroot/rust-helvum'...
$ git fetch origin e665835255c28afb577d7e6e9be63f8cff0ec6f3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-helvum
 * [new ref]         e665835255c28afb577d7e6e9be63f8cff0ec6f3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e665835 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild