$ git clone -n https://src.fedoraproject.org/rpms/perl-Graphics-Toolkit-Color.git /var/lib/mock/f45-build-23826-599/root/chroot_tmpdir/scmroot/perl-Graphics-Toolkit-Color
Cloning into '/var/lib/mock/f45-build-23826-599/root/chroot_tmpdir/scmroot/perl-Graphics-Toolkit-Color'...
$ git fetch origin e99ad2d0cce0557f5066d1e6dcce07f95bdbb909:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Graphics-Toolkit-Color
 * [new ref]         e99ad2d0cce0557f5066d1e6dcce07f95bdbb909 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e99ad2d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild