$ git clone -n https://src.fedoraproject.org/rpms/samba.git /var/lib/mock/f41-build-857875-168247/root/chroot_tmpdir/scmroot/samba
Cloning into '/var/lib/mock/f41-build-857875-168247/root/chroot_tmpdir/scmroot/samba'...
$ git fetch origin aa82984a45426a9202b3b62935bfbab7731e2bfc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/samba
 * [new ref]         aa82984a45426a9202b3b62935bfbab7731e2bfc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aa82984 Don't use RTLD_DEEPBIND by default in libldb