$ git clone -n https://src.fedoraproject.org/rpms/mepack.git /var/lib/mock/f45-build-18246-512/root/chroot_tmpdir/scmroot/mepack
Cloning into '/var/lib/mock/f45-build-18246-512/root/chroot_tmpdir/scmroot/mepack'...
$ git fetch origin 82a8daf41a9b210321588cc6581528c1dd370588:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mepack
 * [new ref]         82a8daf41a9b210321588cc6581528c1dd370588 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 82a8daf Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild