$ git clone -n https://src.fedoraproject.org/rpms/perl-Color-RGB-Util.git /var/lib/mock/f45-build-22409-591/root/chroot_tmpdir/scmroot/perl-Color-RGB-Util
Cloning into '/var/lib/mock/f45-build-22409-591/root/chroot_tmpdir/scmroot/perl-Color-RGB-Util'...
$ git fetch origin 07f594d8d5238483b4c01724252d480ed405970f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Color-RGB-Util
 * [new ref]         07f594d8d5238483b4c01724252d480ed405970f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 07f594d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild