$ git clone -n https://src.fedoraproject.org/rpms/pptpd.git /var/lib/mock/f45-build-28883-633/root/chroot_tmpdir/scmroot/pptpd
Cloning into '/var/lib/mock/f45-build-28883-633/root/chroot_tmpdir/scmroot/pptpd'...
$ git fetch origin 5eded6ce726c176cbda2ee526b59001bd7a24d9c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pptpd
 * [new ref]         5eded6ce726c176cbda2ee526b59001bd7a24d9c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5eded6c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild