$ git clone -n https://src.fedoraproject.org/rpms/jakarta-json.git /var/lib/mock/f39-build-1505817-35163/root/chroot_tmpdir/scmroot/jakarta-json
Cloning into '/var/lib/mock/f39-build-1505817-35163/root/chroot_tmpdir/scmroot/jakarta-json'...
$ git fetch origin 17769bc5ca1052185ba0e70de010ab0f0cc4cdee:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jakarta-json
 * [new ref]         17769bc5ca1052185ba0e70de010ab0f0cc4cdee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 17769bc Version 2.1.3