$ git clone -n https://src.fedoraproject.org/rpms/perl-Net-Server-SS-PreFork.git /var/lib/mock/f45-build-25393-610/root/chroot_tmpdir/scmroot/perl-Net-Server-SS-PreFork
Cloning into '/var/lib/mock/f45-build-25393-610/root/chroot_tmpdir/scmroot/perl-Net-Server-SS-PreFork'...
$ git fetch origin eaa60410d5479927c08ee76631335393d2ec7980:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Net-Server-SS-PreFork
 * [new ref]         eaa60410d5479927c08ee76631335393d2ec7980 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eaa6041 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild