$ git clone -n https://src.fedoraproject.org/rpms/paho-c.git /var/lib/mock/f45-build-21304-583/root/chroot_tmpdir/scmroot/paho-c
Cloning into '/var/lib/mock/f45-build-21304-583/root/chroot_tmpdir/scmroot/paho-c'...
$ git fetch origin 3fe3f05a8e9d9d00b5da56e7ae4243fe3a99a3f6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/paho-c
 * [new ref]         3fe3f05a8e9d9d00b5da56e7ae4243fe3a99a3f6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3fe3f05 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild