$ git clone -n https://src.fedoraproject.org/rpms/ghc-turtle.git /var/lib/mock/f38-build-side-42-init-devel-913370-28703/root/chroot_tmpdir/scmroot/ghc-turtle
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-913370-28703/root/chroot_tmpdir/scmroot/ghc-turtle'...
$ git fetch origin 8413a615b88f25696e89a61cb61d851812ac829c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-turtle
 * [new ref]         8413a615b88f25696e89a61cb61d851812ac829c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8413a61 Convert to %autorelease and %autochangelog