$ git clone -n https://src.fedoraproject.org/rpms/ibus-libpinyin.git /var/lib/mock/f39-build-2034463-47864/root/chroot_tmpdir/scmroot/ibus-libpinyin
Cloning into '/var/lib/mock/f39-build-2034463-47864/root/chroot_tmpdir/scmroot/ibus-libpinyin'...
$ git fetch origin 2712cf891fd3406ba681663d32ec0a335271d73d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ibus-libpinyin
 * [new ref]         2712cf891fd3406ba681663d32ec0a335271d73d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2712cf8 Update to 1.15.6