$ git clone -n https://src.fedoraproject.org/rpms/ghc-wai-websockets.git /var/lib/mock/f38-build-side-42-init-devel-1321942-30692/root/chroot_tmpdir/scmroot/ghc-wai-websockets
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1321942-30692/root/chroot_tmpdir/scmroot/ghc-wai-websockets'...
$ git fetch origin 2a3f016a88bac8cc0c923eb5e4997a94418bdf60:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-wai-websockets
 * [new ref]         2a3f016a88bac8cc0c923eb5e4997a94418bdf60 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2a3f016 Convert to %autorelease and %autochangelog