$ git clone -n https://src.fedoraproject.org/rpms/cups-pk-helper.git /var/lib/mock/f40-build-801107-143713/root/chroot_tmpdir/scmroot/cups-pk-helper
Cloning into '/var/lib/mock/f40-build-801107-143713/root/chroot_tmpdir/scmroot/cups-pk-helper'...
$ git fetch origin 73c25868b4e8f0608fe0c218a4077f0a501f6df1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cups-pk-helper
 * [new ref]         73c25868b4e8f0608fe0c218a4077f0a501f6df1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 73c2586 Migrated to SPDX license