$ git clone -n https://src.fedoraproject.org/rpms/unar.git /var/lib/mock/f41-build-side-1-2671151-29085/root/chroot_tmpdir/scmroot/unar
Cloning into '/var/lib/mock/f41-build-side-1-2671151-29085/root/chroot_tmpdir/scmroot/unar'...
$ git fetch origin 0e2e3c6519b3368555e16a271f32b155daf3b5df:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/unar
 * [new ref]         0e2e3c6519b3368555e16a271f32b155daf3b5df -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0e2e3c6 convert license to SPDX