$ git clone -n https://src.fedoraproject.org/rpms/R-fansi.git /var/lib/mock/f45-build-6049-346/root/chroot_tmpdir/scmroot/R-fansi
Cloning into '/var/lib/mock/f45-build-6049-346/root/chroot_tmpdir/scmroot/R-fansi'...
$ git fetch origin a9a08992dc08e0fd003faf270734d28822f5f04b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-fansi
 * [new ref]         a9a08992dc08e0fd003faf270734d28822f5f04b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a9a0899 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild