$ git clone -n https://src.fedoraproject.org/rpms/kf6-kdesu.git /var/lib/mock/f42-build-867894-175861/root/chroot_tmpdir/scmroot/kf6-kdesu
Cloning into '/var/lib/mock/f42-build-867894-175861/root/chroot_tmpdir/scmroot/kf6-kdesu'...
$ git fetch origin d49a5c871c879830c8ba04f6a51f2779ee376c7e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kdesu
 * [new ref]         d49a5c871c879830c8ba04f6a51f2779ee376c7e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d49a5c8 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild