$ git clone -n https://src.fedoraproject.org/rpms/ghc-doctest.git /var/lib/mock/f45-build-10241-414/root/chroot_tmpdir/scmroot/ghc-doctest
Cloning into '/var/lib/mock/f45-build-10241-414/root/chroot_tmpdir/scmroot/ghc-doctest'...
$ git fetch origin e6d9d841178f3b2fb6f30a83f371a9d3fb17925f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-doctest
 * [new ref]         e6d9d841178f3b2fb6f30a83f371a9d3fb17925f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e6d9d84 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild