$ git clone -n https://src.fedoraproject.org/rpms/python-jsonschema-specifications.git /var/lib/mock/f39-build-1853251-42373/root/chroot_tmpdir/scmroot/python-jsonschema-specifications
Cloning into '/var/lib/mock/f39-build-1853251-42373/root/chroot_tmpdir/scmroot/python-jsonschema-specifications'...
$ git fetch origin d2d4ddd0fe9d65e562170c5ca9c075c09ad5e87a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jsonschema-specifications
 * [new ref]         d2d4ddd0fe9d65e562170c5ca9c075c09ad5e87a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d2d4ddd Initial package