$ git clone -n https://src.fedoraproject.org/rpms/juk.git /var/lib/mock/f42-build-side-1-3533522-46362/root/chroot_tmpdir/scmroot/juk
Cloning into '/var/lib/mock/f42-build-side-1-3533522-46362/root/chroot_tmpdir/scmroot/juk'...
$ git fetch origin b01057eb2a9e38fa7ead1f892a6ed1670b20f481:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/juk
 * [new ref]         b01057eb2a9e38fa7ead1f892a6ed1670b20f481 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b01057e 25.04.1