$ git clone -n https://src.fedoraproject.org/rpms/opus.git /var/lib/mock/f45-build-21187-580/root/chroot_tmpdir/scmroot/opus
Cloning into '/var/lib/mock/f45-build-21187-580/root/chroot_tmpdir/scmroot/opus'...
$ git fetch origin 8692cb3130a9f9285dba78b2b4aa7dd928bf13d6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/opus
 * [new ref]         8692cb3130a9f9285dba78b2b4aa7dd928bf13d6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8692cb3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild