$ git clone -n https://src.fedoraproject.org/rpms/cjdns.git /var/lib/mock/f42-build-3348042-45005/root/chroot_tmpdir/scmroot/cjdns
Cloning into '/var/lib/mock/f42-build-3348042-45005/root/chroot_tmpdir/scmroot/cjdns'...
$ git fetch origin a34cb658f91e90a0b3434904e1904a21cf1290d5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cjdns
 * [new ref]         a34cb658f91e90a0b3434904e1904a21cf1290d5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a34cb65 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild