$ git clone -n https://src.fedoraproject.org/rpms/objfw.git /var/lib/mock/f40-build-1933457-25127/root/chroot_tmpdir/scmroot/objfw
Cloning into '/var/lib/mock/f40-build-1933457-25127/root/chroot_tmpdir/scmroot/objfw'...
$ git fetch origin d368a40e972f9869c3f4a6c5984911c8407fb20f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/objfw
 * [new ref]         d368a40e972f9869c3f4a6c5984911c8407fb20f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d368a40 Merge branch 'rawhide' into f40