$ git clone -n https://src.fedoraproject.org/rpms/radius-engine.git /var/lib/mock/f45-build-34276-683/root/chroot_tmpdir/scmroot/radius-engine
Cloning into '/var/lib/mock/f45-build-34276-683/root/chroot_tmpdir/scmroot/radius-engine'...
$ git fetch origin e1ee30c81824f32bf08fc82f08b3ccc2945bbff6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/radius-engine
 * [new ref]         e1ee30c81824f32bf08fc82f08b3ccc2945bbff6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e1ee30c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild