$ git clone -n https://src.fedoraproject.org/rpms/emacs.git /var/lib/mock/f40-build-2207749-52098/root/chroot_tmpdir/scmroot/emacs
Cloning into '/var/lib/mock/f40-build-2207749-52098/root/chroot_tmpdir/scmroot/emacs'...
$ git fetch origin 6efc21e5fc6a8233d774ccb907e3942e753ce4e8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/emacs
 * [new ref]         6efc21e5fc6a8233d774ccb907e3942e753ce4e8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6efc21e use correct BuildRequires for SQLite support