$ git clone -n https://src.fedoraproject.org/rpms/kf5-kjsembed.git /var/lib/mock/f40-build-2292611-56146/root/chroot_tmpdir/scmroot/kf5-kjsembed
Cloning into '/var/lib/mock/f40-build-2292611-56146/root/chroot_tmpdir/scmroot/kf5-kjsembed'...
$ git fetch origin 4659622c13f224b2b7eec054d93c4ac1b1731c8e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kjsembed
 * [new ref]         4659622c13f224b2b7eec054d93c4ac1b1731c8e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4659622 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild