$ git clone -n https://src.fedoraproject.org/rpms/ghc-bitarray.git /var/lib/mock/f40-build-1997705-44169/root/chroot_tmpdir/scmroot/ghc-bitarray
Cloning into '/var/lib/mock/f40-build-1997705-44169/root/chroot_tmpdir/scmroot/ghc-bitarray'...
$ git fetch origin 4815a1f12630ef22749adacf808de160a7d16346:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-bitarray
 * [new ref]         4815a1f12630ef22749adacf808de160a7d16346 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4815a1f bump release