$ git clone -n https://src.fedoraproject.org/rpms/ghc-haskell-src-exts-util.git /var/lib/mock/f38-build-side-42-init-devel-959296-28787/root/chroot_tmpdir/scmroot/ghc-haskell-src-exts-util
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-959296-28787/root/chroot_tmpdir/scmroot/ghc-haskell-src-exts-util'...
$ git fetch origin 96e227738c50baa67c927dd40d0976b143fcf63c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-haskell-src-exts-util
 * [new ref]         96e227738c50baa67c927dd40d0976b143fcf63c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 96e2277 Convert to %autorelease and %autochangelog