$ git clone -n https://src.fedoraproject.org/rpms/poppler.git /var/lib/mock/f41-build-810483-146720/root/chroot_tmpdir/scmroot/poppler
Cloning into '/var/lib/mock/f41-build-810483-146720/root/chroot_tmpdir/scmroot/poppler'...
$ git fetch origin 02137319820aad041f66cbe3fa0c0e42b1654627:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/poppler
 * [new ref]         02137319820aad041f66cbe3fa0c0e42b1654627 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0213731 Migrated to SPDX license