$ git clone -n https://src.fedoraproject.org/rpms/ghc-language-c99-util.git /var/lib/mock/f45-build-10475-418/root/chroot_tmpdir/scmroot/ghc-language-c99-util
Cloning into '/var/lib/mock/f45-build-10475-418/root/chroot_tmpdir/scmroot/ghc-language-c99-util'...
$ git fetch origin be57cba9f2ea470fe629773c5d7b83b0bae8885d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-language-c99-util
 * [new ref]         be57cba9f2ea470fe629773c5d7b83b0bae8885d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at be57cba Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild