$ git clone -n https://src.fedoraproject.org/rpms/bcd.git /var/lib/mock/f40-build-1991550-43500/root/chroot_tmpdir/scmroot/bcd
Cloning into '/var/lib/mock/f40-build-1991550-43500/root/chroot_tmpdir/scmroot/bcd'...
$ git fetch origin bf97d501ffc62b39c593a2f06335f427c21e1875:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bcd
 * [new ref]         bf97d501ffc62b39c593a2f06335f427c21e1875 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bf97d50 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild