$ git clone -n https://src.fedoraproject.org/rpms/ghc-dbus.git /var/lib/mock/f41-build-840807-160954/root/chroot_tmpdir/scmroot/ghc-dbus
Cloning into '/var/lib/mock/f41-build-840807-160954/root/chroot_tmpdir/scmroot/ghc-dbus'...
$ git fetch origin f73df41d57d8eedb88ca486a1e6b8c0a3a1bacc3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-dbus
 * [new ref]         f73df41d57d8eedb88ca486a1e6b8c0a3a1bacc3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f73df41 https://hackage.haskell.org/package/dbus-1.3.3/changelog