$ git clone -n https://src.fedoraproject.org/rpms/perl-App-s2p.git /var/lib/mock/f45-build-21776-588/root/chroot_tmpdir/scmroot/perl-App-s2p
Cloning into '/var/lib/mock/f45-build-21776-588/root/chroot_tmpdir/scmroot/perl-App-s2p'...
$ git fetch origin 98845c9de282c770e613a0f91c2b84d7e92393b3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-App-s2p
 * [new ref]         98845c9de282c770e613a0f91c2b84d7e92393b3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 98845c9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild