$ git clone -n https://src.fedoraproject.org/rpms/bind-dyndb-ldap.git /var/lib/mock/f39-build-1466123-33647/root/chroot_tmpdir/scmroot/bind-dyndb-ldap
Cloning into '/var/lib/mock/f39-build-1466123-33647/root/chroot_tmpdir/scmroot/bind-dyndb-ldap'...
$ git fetch origin 5bf8482a878a628734028092e86899057ea7d399:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bind-dyndb-ldap
 * [new ref]         5bf8482a878a628734028092e86899057ea7d399 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5bf8482 Require autoconf-archive at build time