$ git clone -n https://src.fedoraproject.org/rpms/ghc-data-default.git /var/lib/mock/f38-build-side-42-init-devel-749876-27661/root/chroot_tmpdir/scmroot/ghc-data-default
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-749876-27661/root/chroot_tmpdir/scmroot/ghc-data-default'...
$ git fetch origin 692ff27351d27ee2a6e170eb003c12c013b286d1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-data-default
 * [new ref]         692ff27351d27ee2a6e170eb003c12c013b286d1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 692ff27 Convert to %autorelease and %autochangelog