$ git clone -n https://src.fedoraproject.org/rpms/wsjtx.git /var/lib/mock/f45-build-38541-725/root/chroot_tmpdir/scmroot/wsjtx
Cloning into '/var/lib/mock/f45-build-38541-725/root/chroot_tmpdir/scmroot/wsjtx'...
$ git fetch origin 5642f2f14a9a43658025f2e462b0e6094ac75ee5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wsjtx
 * [new ref]         5642f2f14a9a43658025f2e462b0e6094ac75ee5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5642f2f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild