$ git clone -n https://src.fedoraproject.org/rpms/rp-pppoe.git /var/lib/mock/f45-build-34642-690/root/chroot_tmpdir/scmroot/rp-pppoe
Cloning into '/var/lib/mock/f45-build-34642-690/root/chroot_tmpdir/scmroot/rp-pppoe'...
$ git fetch origin 7bd05dbfec0c0ca05c0eb0555c4e7239c4eaf43c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rp-pppoe
 * [new ref]         7bd05dbfec0c0ca05c0eb0555c4e7239c4eaf43c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7bd05db Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild