$ git clone -n https://src.fedoraproject.org/rpms/perl-Crypt-Random-Source.git /var/lib/mock/f45-build-22652-593/root/chroot_tmpdir/scmroot/perl-Crypt-Random-Source
Cloning into '/var/lib/mock/f45-build-22652-593/root/chroot_tmpdir/scmroot/perl-Crypt-Random-Source'...
$ git fetch origin eb0699dd37f0df89cd538e15d1d0e31cec4e6a51:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Crypt-Random-Source
 * [new ref]         eb0699dd37f0df89cd538e15d1d0e31cec4e6a51 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eb0699d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild