$ git clone -n https://src.fedoraproject.org/rpms/ghc-language-javascript.git /var/lib/mock/f45-build-10466-418/root/chroot_tmpdir/scmroot/ghc-language-javascript
Cloning into '/var/lib/mock/f45-build-10466-418/root/chroot_tmpdir/scmroot/ghc-language-javascript'...
$ git fetch origin e78754116ea5d826381c96352d7674c70e54dfa6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-language-javascript
 * [new ref]         e78754116ea5d826381c96352d7674c70e54dfa6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e787541 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild