$ git clone -n https://src.fedoraproject.org/rpms/perl-Pod-Elemental.git /var/lib/mock/f45-build-25800-613/root/chroot_tmpdir/scmroot/perl-Pod-Elemental
Cloning into '/var/lib/mock/f45-build-25800-613/root/chroot_tmpdir/scmroot/perl-Pod-Elemental'...
$ git fetch origin 287bbfd46e7524c4264eea7bfb1f0ac4fb4c1d8d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Pod-Elemental
 * [new ref]         287bbfd46e7524c4264eea7bfb1f0ac4fb4c1d8d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 287bbfd Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild