$ git clone -n https://src.fedoraproject.org/rpms/R-RColorBrewer.git /var/lib/mock/f45-build-5881-345/root/chroot_tmpdir/scmroot/R-RColorBrewer
Cloning into '/var/lib/mock/f45-build-5881-345/root/chroot_tmpdir/scmroot/R-RColorBrewer'...
$ git fetch origin 9a890440257e8da4d552747b21e01ca8d295a0d8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-RColorBrewer
 * [new ref]         9a890440257e8da4d552747b21e01ca8d295a0d8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9a89044 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild