$ git clone -n https://src.fedoraproject.org/rpms/which.git /var/lib/mock/f41-build-811667-147476/root/chroot_tmpdir/scmroot/which
Cloning into '/var/lib/mock/f41-build-811667-147476/root/chroot_tmpdir/scmroot/which'...
$ git fetch origin 34aba6f9e40e476d3b286c18082228ce255ae42e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/which
 * [new ref]         34aba6f9e40e476d3b286c18082228ce255ae42e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 34aba6f Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild