$ git clone -n https://src.fedoraproject.org/rpms/python-jsonschema-specifications.git /var/lib/mock/f45-build-31201-651/root/chroot_tmpdir/scmroot/python-jsonschema-specifications
Cloning into '/var/lib/mock/f45-build-31201-651/root/chroot_tmpdir/scmroot/python-jsonschema-specifications'...
$ git fetch origin 211d5669b9a15e457a967d6c74ac0d52fc4e9db7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jsonschema-specifications
 * [new ref]         211d5669b9a15e457a967d6c74ac0d52fc4e9db7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 211d566 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild