$ git clone -n https://src.fedoraproject.org/rpms/yosyshq-abc.git /var/lib/mock/f40-build-2648659-66798/root/chroot_tmpdir/scmroot/yosyshq-abc
Cloning into '/var/lib/mock/f40-build-2648659-66798/root/chroot_tmpdir/scmroot/yosyshq-abc'...
$ git fetch origin c7b3d4e9c7af541b8ee1702c0a25de35340a63db:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/yosyshq-abc
 * [new ref]         c7b3d4e9c7af541b8ee1702c0a25de35340a63db -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c7b3d4e update to 0.39 snapshot