$ git clone -n https://src.fedoraproject.org/rpms/perl-Color-Calc.git /var/lib/mock/f45-build-22414-591/root/chroot_tmpdir/scmroot/perl-Color-Calc
Cloning into '/var/lib/mock/f45-build-22414-591/root/chroot_tmpdir/scmroot/perl-Color-Calc'...
$ git fetch origin 9c3805bec33e2875ae78d7f7bb40ed382560d451:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Color-Calc
 * [new ref]         9c3805bec33e2875ae78d7f7bb40ed382560d451 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9c3805b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild