$ git clone -n https://src.fedoraproject.org/rpms/juk.git /var/lib/mock/f45-build-14483-461/root/chroot_tmpdir/scmroot/juk
Cloning into '/var/lib/mock/f45-build-14483-461/root/chroot_tmpdir/scmroot/juk'...
$ git fetch origin f1f96bbc67c266e5bf50c223441ff5f6a387edd4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/juk
 * [new ref]         f1f96bbc67c266e5bf50c223441ff5f6a387edd4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f1f96bb 26.08.1