$ git clone -n https://src.fedoraproject.org/rpms/rust-sval_json.git /var/lib/mock/f40-build-2643736-66490/root/chroot_tmpdir/scmroot/rust-sval_json
Cloning into '/var/lib/mock/f40-build-2643736-66490/root/chroot_tmpdir/scmroot/rust-sval_json'...
$ git fetch origin 47ce25dc9b86d86b092210d5d83f9bbf4b576b3e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sval_json
 * [new ref]         47ce25dc9b86d86b092210d5d83f9bbf4b576b3e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 47ce25d Update to version 2.11.1; Fixes RHBZ#2256400