$ git clone -n https://src.fedoraproject.org/rpms/ghc-HsYAML.git /var/lib/mock/f45-build-9905-411/root/chroot_tmpdir/scmroot/ghc-HsYAML
Cloning into '/var/lib/mock/f45-build-9905-411/root/chroot_tmpdir/scmroot/ghc-HsYAML'...
$ git fetch origin a3a0e55b1da7fe6ce77767d12362c8cc2625468c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-HsYAML
 * [new ref]         a3a0e55b1da7fe6ce77767d12362c8cc2625468c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a3a0e55 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild