$ git clone -n https://src.fedoraproject.org/rpms/rust-sval_json.git /var/lib/mock/f39-build-2023839-46881/root/chroot_tmpdir/scmroot/rust-sval_json
Cloning into '/var/lib/mock/f39-build-2023839-46881/root/chroot_tmpdir/scmroot/rust-sval_json'...
$ git fetch origin a5edad07ff9d054bb0393e192338a90829cac2b7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sval_json
 * [new ref]         a5edad07ff9d054bb0393e192338a90829cac2b7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a5edad0 Update to version 2.10.2; Fixes RHBZ#2239956