$ git clone -n https://src.fedoraproject.org/rpms/ghc-cmdargs.git /var/lib/mock/f45-build-10069-413/root/chroot_tmpdir/scmroot/ghc-cmdargs
Cloning into '/var/lib/mock/f45-build-10069-413/root/chroot_tmpdir/scmroot/ghc-cmdargs'...
$ git fetch origin 387de3b1bd6fdf9a63eb72b0ef2c3b93bdf5a50d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-cmdargs
 * [new ref]         387de3b1bd6fdf9a63eb72b0ef2c3b93bdf5a50d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 387de3b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild