$ git clone -n https://src.fedoraproject.org/rpms/ghc-cassava.git /var/lib/mock/f38-build-side-42-init-devel-890261-28528/root/chroot_tmpdir/scmroot/ghc-cassava
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-890261-28528/root/chroot_tmpdir/scmroot/ghc-cassava'...
$ git fetch origin 33c1307e8a109e7fbb7aca05e37b4720eb53f751:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-cassava
 * [new ref]         33c1307e8a109e7fbb7aca05e37b4720eb53f751 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 33c1307 Convert to %autorelease and %autochangelog