$ git clone -n https://src.fedoraproject.org/rpms/cubeb.git /var/lib/mock/f45-build-5477-339/root/chroot_tmpdir/scmroot/cubeb
Cloning into '/var/lib/mock/f45-build-5477-339/root/chroot_tmpdir/scmroot/cubeb'...
$ git fetch origin 6114939fcc59f4b868fd1fce6755acff65b167e3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cubeb
 * [new ref]         6114939fcc59f4b868fd1fce6755acff65b167e3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6114939 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild