$ git clone -n https://src.fedoraproject.org/rpms/ghc-DAV.git /var/lib/mock/f40-build-744979-111932/root/chroot_tmpdir/scmroot/ghc-DAV
Cloning into '/var/lib/mock/f40-build-744979-111932/root/chroot_tmpdir/scmroot/ghc-DAV'...
$ git fetch origin fd89be92343681eb294ec3778ed2ddb72a6f3c05:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-DAV
 * [new ref]         fd89be92343681eb294ec3778ed2ddb72a6f3c05 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fd89be9 bump release