$ git clone -n https://src.fedoraproject.org/rpms/ghc-attoparsec.git /var/lib/mock/f38-build-side-42-init-devel-954907-28786/root/chroot_tmpdir/scmroot/ghc-attoparsec
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-954907-28786/root/chroot_tmpdir/scmroot/ghc-attoparsec'...
$ git fetch origin fbc84f57be2b489a843787a487d10538bd72f868:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-attoparsec
 * [new ref]         fbc84f57be2b489a843787a487d10538bd72f868 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fbc84f5 Convert to %autorelease and %autochangelog