$ git clone -n https://src.fedoraproject.org/rpms/ghc-mime-types.git /var/lib/mock/f45-build-10531-418/root/chroot_tmpdir/scmroot/ghc-mime-types
Cloning into '/var/lib/mock/f45-build-10531-418/root/chroot_tmpdir/scmroot/ghc-mime-types'...
$ git fetch origin 24072f51c2617285270cf9454c3d57b778a2c50c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-mime-types
 * [new ref]         24072f51c2617285270cf9454c3d57b778a2c50c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 24072f5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild