$ git clone -n https://src.fedoraproject.org/rpms/arch-install-scripts.git /var/lib/mock/f39-build-2229528-53154/root/chroot_tmpdir/scmroot/arch-install-scripts
Cloning into '/var/lib/mock/f39-build-2229528-53154/root/chroot_tmpdir/scmroot/arch-install-scripts'...
$ git fetch origin 4c03eedcb3cbf2b9a9a070eae7d7a73ed667bd9f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/arch-install-scripts
 * [new ref]         4c03eedcb3cbf2b9a9a070eae7d7a73ed667bd9f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4c03eed Convert license tag to SPDX