$ git clone -n https://src.fedoraproject.org/rpms/fortune-mod.git /var/lib/mock/f45-build-9184-399/root/chroot_tmpdir/scmroot/fortune-mod
Cloning into '/var/lib/mock/f45-build-9184-399/root/chroot_tmpdir/scmroot/fortune-mod'...
$ git fetch origin 8ce4b6a0bab44923b37656daa840b0822fa3ceed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fortune-mod
 * [new ref]         8ce4b6a0bab44923b37656daa840b0822fa3ceed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8ce4b6a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild