$ git clone -n https://src.fedoraproject.org/rpms/nodejs-buble.git /var/lib/mock/f45-build-19721-554/root/chroot_tmpdir/scmroot/nodejs-buble
Cloning into '/var/lib/mock/f45-build-19721-554/root/chroot_tmpdir/scmroot/nodejs-buble'...
$ git fetch origin ce1ef819a09ec68928c2a8402289fb7b1f1fc204:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nodejs-buble
 * [new ref]         ce1ef819a09ec68928c2a8402289fb7b1f1fc204 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ce1ef81 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild