$ git clone -n https://src.fedoraproject.org/rpms/perl-Proc-WaitStat.git /var/lib/mock/f45-build-25931-613/root/chroot_tmpdir/scmroot/perl-Proc-WaitStat
Cloning into '/var/lib/mock/f45-build-25931-613/root/chroot_tmpdir/scmroot/perl-Proc-WaitStat'...
$ git fetch origin 3c1b95e039e40e0440de1d8941335a8dcf267db1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Proc-WaitStat
 * [new ref]         3c1b95e039e40e0440de1d8941335a8dcf267db1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3c1b95e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild