$ git clone -n https://src.fedoraproject.org/rpms/cjdns.git /var/lib/mock/f39-build-1918069-42932/root/chroot_tmpdir/scmroot/cjdns
Cloning into '/var/lib/mock/f39-build-1918069-42932/root/chroot_tmpdir/scmroot/cjdns'...
$ git fetch origin d6d535b0eed82317afdef31a2c64f12c333c6cd5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cjdns
 * [new ref]         d6d535b0eed82317afdef31a2c64f12c333c6cd5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d6d535b Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild