$ git clone -n https://src.fedoraproject.org/rpms/fortune-firefly.git /var/lib/mock/f45-build-9177-399/root/chroot_tmpdir/scmroot/fortune-firefly
Cloning into '/var/lib/mock/f45-build-9177-399/root/chroot_tmpdir/scmroot/fortune-firefly'...
$ git fetch origin 7f36a431219f2d2aa18e68e7a4cc047ca6d396a2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fortune-firefly
 * [new ref]         7f36a431219f2d2aa18e68e7a4cc047ca6d396a2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7f36a43 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild