$ git clone -n https://src.fedoraproject.org/rpms/k3b.git /var/lib/mock/f40-build-2349123-60156/root/chroot_tmpdir/scmroot/k3b
Cloning into '/var/lib/mock/f40-build-2349123-60156/root/chroot_tmpdir/scmroot/k3b'...
$ git fetch origin 481fa1c14e49e07e925b4d994b18afc070c70f44:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/k3b
 * [new ref]         481fa1c14e49e07e925b4d994b18afc070c70f44 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 481fa1c Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild