$ git clone -n https://src.fedoraproject.org/rpms/rtpproxy.git /var/lib/mock/f45-build-34735-691/root/chroot_tmpdir/scmroot/rtpproxy
Cloning into '/var/lib/mock/f45-build-34735-691/root/chroot_tmpdir/scmroot/rtpproxy'...
$ git fetch origin 3bee60df92e7046aa71f8a5be1f6c5466503331b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rtpproxy
 * [new ref]         3bee60df92e7046aa71f8a5be1f6c5466503331b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3bee60d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild