$ git clone -n https://src.fedoraproject.org/rpms/ghc-wai-cors.git /var/lib/mock/f38-build-side-42-init-devel-778516-27878/root/chroot_tmpdir/scmroot/ghc-wai-cors
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-778516-27878/root/chroot_tmpdir/scmroot/ghc-wai-cors'...
$ git fetch origin f89d283861c390887912ce4195d4810a085e4621:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-wai-cors
 * [new ref]         f89d283861c390887912ce4195d4810a085e4621 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f89d283 Convert to %autorelease and %autochangelog