$ git clone -n https://src.fedoraproject.org/rpms/ghc-HUnit.git /var/lib/mock/f38-build-side-42-init-devel-890088-28528/root/chroot_tmpdir/scmroot/ghc-HUnit
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-890088-28528/root/chroot_tmpdir/scmroot/ghc-HUnit'...
$ git fetch origin dba6e5fb79b324c59256d812dc8323c8d0ffa647:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-HUnit
 * [new ref]         dba6e5fb79b324c59256d812dc8323c8d0ffa647 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dba6e5f Convert to %autorelease and %autochangelog