$ git clone -n https://src.fedoraproject.org/rpms/colorgcc.git /var/lib/mock/f45-build-4703-333/root/chroot_tmpdir/scmroot/colorgcc
Cloning into '/var/lib/mock/f45-build-4703-333/root/chroot_tmpdir/scmroot/colorgcc'...
$ git fetch origin 5b2a0c8fd71bee9bfea33891300377c7480c2391:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/colorgcc
 * [new ref]         5b2a0c8fd71bee9bfea33891300377c7480c2391 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5b2a0c8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild