$ git clone -n https://src.fedoraproject.org/rpms/perl-Proc-Simple.git /var/lib/mock/f45-build-25933-613/root/chroot_tmpdir/scmroot/perl-Proc-Simple
Cloning into '/var/lib/mock/f45-build-25933-613/root/chroot_tmpdir/scmroot/perl-Proc-Simple'...
$ git fetch origin 64829386fa091d53d6a3786890b72a88140afb3e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Proc-Simple
 * [new ref]         64829386fa091d53d6a3786890b72a88140afb3e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6482938 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild