$ git clone -n https://src.fedoraproject.org/rpms/perl-Authen-Radius.git /var/lib/mock/f45-build-21836-588/root/chroot_tmpdir/scmroot/perl-Authen-Radius
Cloning into '/var/lib/mock/f45-build-21836-588/root/chroot_tmpdir/scmroot/perl-Authen-Radius'...
$ git fetch origin 4ddf2140628da8197d5fac1d47f83c7c733705b5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Authen-Radius
 * [new ref]         4ddf2140628da8197d5fac1d47f83c7c733705b5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4ddf214 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild