$ git clone -n https://src.fedoraproject.org/rpms/apache-commons-collections4.git /var/lib/mock/f40-build-2117366-50724/root/chroot_tmpdir/scmroot/apache-commons-collections4
Cloning into '/var/lib/mock/f40-build-2117366-50724/root/chroot_tmpdir/scmroot/apache-commons-collections4'...
$ git fetch origin 6c20c066ec9533d70545bc8645d3da9a401c6fed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/apache-commons-collections4
 * [new ref]         6c20c066ec9533d70545bc8645d3da9a401c6fed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6c20c06 Migrate to SPDX license