$ git clone -n https://src.fedoraproject.org/rpms/kdf.git /var/lib/mock/f45-build-14688-462/root/chroot_tmpdir/scmroot/kdf
Cloning into '/var/lib/mock/f45-build-14688-462/root/chroot_tmpdir/scmroot/kdf'...
$ git fetch origin ec98c47d6486df9927d63f943081168a13687873:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kdf
 * [new ref]         ec98c47d6486df9927d63f943081168a13687873 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec98c47 26.08.1