$ git clone -n https://src.fedoraproject.org/rpms/fluent-bit.git /var/lib/mock/f40-build-1915217-25086/root/chroot_tmpdir/scmroot/fluent-bit
Cloning into '/var/lib/mock/f40-build-1915217-25086/root/chroot_tmpdir/scmroot/fluent-bit'...
$ git fetch origin d62c5eaf3c64e7781fa69dc68f874d7bf4bd2b0f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fluent-bit
 * [new ref]         d62c5eaf3c64e7781fa69dc68f874d7bf4bd2b0f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d62c5ea Update to 3.0.4