$ git clone -n https://src.fedoraproject.org/rpms/perl-Clone-PP.git /var/lib/mock/f45-build-22374-591/root/chroot_tmpdir/scmroot/perl-Clone-PP
Cloning into '/var/lib/mock/f45-build-22374-591/root/chroot_tmpdir/scmroot/perl-Clone-PP'...
$ git fetch origin 54b84fbdbb756c80679ca36ebbbf7ef60f673cdb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Clone-PP
 * [new ref]         54b84fbdbb756c80679ca36ebbbf7ef60f673cdb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 54b84fb Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild