$ git clone -n https://src.fedoraproject.org/rpms/libnitrokey.git /var/lib/mock/f45-build-16648-489/root/chroot_tmpdir/scmroot/libnitrokey
Cloning into '/var/lib/mock/f45-build-16648-489/root/chroot_tmpdir/scmroot/libnitrokey'...
$ git fetch origin 290f2b03ab783e8b6969477e7bbdc7c468b6a96e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libnitrokey
 * [new ref]         290f2b03ab783e8b6969477e7bbdc7c468b6a96e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 290f2b0 Enable Offline tests