$ git clone -n https://src.fedoraproject.org/rpms/yyjson.git /var/lib/mock/f40-build-792896-138674/root/chroot_tmpdir/scmroot/yyjson
Cloning into '/var/lib/mock/f40-build-792896-138674/root/chroot_tmpdir/scmroot/yyjson'...
$ git fetch origin 0f2cc7edeaa57f6321c60c0dcab1e866b501e216:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/yyjson
 * [new ref]         0f2cc7edeaa57f6321c60c0dcab1e866b501e216 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0f2cc7e Fix error of -Wno-implicit-int and -Wno-implicit-function-declaration