$ git clone -n https://src.fedoraproject.org/rpms/rocksdb.git /var/lib/mock/f38-build-722471-98813/root/chroot_tmpdir/scmroot/rocksdb
Cloning into '/var/lib/mock/f38-build-722471-98813/root/chroot_tmpdir/scmroot/rocksdb'...
$ git fetch origin e9c3f16b8fd75eb6a30793b8f87bcaf3caab5c52:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rocksdb
 * [new ref]         e9c3f16b8fd75eb6a30793b8f87bcaf3caab5c52 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e9c3f16 Updated to version 7.8.3