$ git clone -n https://src.fedoraproject.org/rpms/perl-RRD-Simple.git /var/lib/mock/f45-build-26012-614/root/chroot_tmpdir/scmroot/perl-RRD-Simple
Cloning into '/var/lib/mock/f45-build-26012-614/root/chroot_tmpdir/scmroot/perl-RRD-Simple'...
$ git fetch origin 8a32e0d7510ec35dbb023fa12e9526cee23d3928:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-RRD-Simple
 * [new ref]         8a32e0d7510ec35dbb023fa12e9526cee23d3928 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8a32e0d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild