$ git clone -n https://src.fedoraproject.org/rpms/ghc-syb.git /var/lib/mock/f45-build-10816-424/root/chroot_tmpdir/scmroot/ghc-syb
Cloning into '/var/lib/mock/f45-build-10816-424/root/chroot_tmpdir/scmroot/ghc-syb'...
$ git fetch origin 0a697780f974da4cd2b59b12a98d99751efa37af:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-syb
 * [new ref]         0a697780f974da4cd2b59b12a98d99751efa37af -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0a69778 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild