$ git clone -n https://src.fedoraproject.org/rpms/python-jcconv.git /var/lib/mock/f45-build-31262-651/root/chroot_tmpdir/scmroot/python-jcconv
Cloning into '/var/lib/mock/f45-build-31262-651/root/chroot_tmpdir/scmroot/python-jcconv'...
$ git fetch origin 0ba7e3b3d9a5c26ec1d02750c970592d80775c3f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jcconv
 * [new ref]         0ba7e3b3d9a5c26ec1d02750c970592d80775c3f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0ba7e3b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild