$ git clone -n https://src.fedoraproject.org/rpms/mingw-jansson.git /var/lib/mock/f45-build-18499-519/root/chroot_tmpdir/scmroot/mingw-jansson
Cloning into '/var/lib/mock/f45-build-18499-519/root/chroot_tmpdir/scmroot/mingw-jansson'...
$ git fetch origin 293452e815c1b75827f4cc2ad5170c12d65ecdca:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-jansson
 * [new ref]         293452e815c1b75827f4cc2ad5170c12d65ecdca -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 293452e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild