$ git clone -n https://src.fedoraproject.org/rpms/utop.git /var/lib/mock/f42-build-3409157-45146/root/chroot_tmpdir/scmroot/utop
Cloning into '/var/lib/mock/f42-build-3409157-45146/root/chroot_tmpdir/scmroot/utop'...
$ git fetch origin b5a79442da5d809207e148f7d7232e1cdaa9acc9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/utop
 * [new ref]         b5a79442da5d809207e148f7d7232e1cdaa9acc9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b5a7944 Add upstream patch to fix the version number