$ git clone -n https://src.fedoraproject.org/rpms/ghc-concurrent-extra.git /var/lib/mock/f38-build-side-42-init-devel-595833-26162/root/chroot_tmpdir/scmroot/ghc-concurrent-extra
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-595833-26162/root/chroot_tmpdir/scmroot/ghc-concurrent-extra'...
$ git fetch origin 1580daa4edaf15716fe817c0cdbc3f8cbb43a93e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-concurrent-extra
 * [new ref]         1580daa4edaf15716fe817c0cdbc3f8cbb43a93e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1580daa Convert to %autorelease and %autochangelog