$ git clone -n https://src.fedoraproject.org/rpms/juk.git /var/lib/mock/f40-build-2005293-45054/root/chroot_tmpdir/scmroot/juk
Cloning into '/var/lib/mock/f40-build-2005293-45054/root/chroot_tmpdir/scmroot/juk'...
$ git fetch origin 2f4953d875c70d944a74c6ebdab31d91b3148ff5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/juk
 * [new ref]         2f4953d875c70d944a74c6ebdab31d91b3148ff5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2f4953d 23.08.2