$ git clone -n https://src.fedoraproject.org/rpms/perl-Net-POP3S.git /var/lib/mock/f45-build-25341-610/root/chroot_tmpdir/scmroot/perl-Net-POP3S
Cloning into '/var/lib/mock/f45-build-25341-610/root/chroot_tmpdir/scmroot/perl-Net-POP3S'...
$ git fetch origin 3958dd8f3261abd80bf0b11506466e2dbd30b919:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Net-POP3S
 * [new ref]         3958dd8f3261abd80bf0b11506466e2dbd30b919 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3958dd8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild