$ git clone -n https://src.fedoraproject.org/rpms/yara.git /var/lib/mock/f40-build-2085096-50049/root/chroot_tmpdir/scmroot/yara
Cloning into '/var/lib/mock/f40-build-2085096-50049/root/chroot_tmpdir/scmroot/yara'...
$ git fetch origin ac1ea090f88dd8500a32c777909498b19ffc878c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/yara
 * [new ref]         ac1ea090f88dd8500a32c777909498b19ffc878c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ac1ea09 Update to 4.4.0 - Closes rhbz#2239308