$ git clone -n https://src.fedoraproject.org/rpms/uglify-js.git /var/lib/mock/f45-build-46557-846/root/chroot_tmpdir/scmroot/uglify-js
Cloning into '/var/lib/mock/f45-build-46557-846/root/chroot_tmpdir/scmroot/uglify-js'...
$ git fetch origin bb4312615739acd46d64ca217094271e7fa87b51:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/uglify-js
 * [new ref]         bb4312615739acd46d64ca217094271e7fa87b51 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb43126 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild