$ git clone -n https://src.fedoraproject.org/rpms/dlib.git /var/lib/mock/f41-build-756189-13417/root/chroot_tmpdir/scmroot/dlib
Cloning into '/var/lib/mock/f41-build-756189-13417/root/chroot_tmpdir/scmroot/dlib'...
$ git fetch origin 820addcb5a850050a232017be4f95e86c67f7f54:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dlib
 * [new ref]         820addcb5a850050a232017be4f95e86c67f7f54 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 820addc Apply patch fixing aarch64