$ git clone -n https://src.fedoraproject.org/rpms/ghc-arrows.git /var/lib/mock/f45-build-9969-412/root/chroot_tmpdir/scmroot/ghc-arrows
Cloning into '/var/lib/mock/f45-build-9969-412/root/chroot_tmpdir/scmroot/ghc-arrows'...
$ git fetch origin 74b7d4181372199207f18dbbdd246f9ddcec3a8a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-arrows
 * [new ref]         74b7d4181372199207f18dbbdd246f9ddcec3a8a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 74b7d41 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild